## What are the first 20 perfect squares?

So the first 20 square numbers are 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361 and 400.

## How many roots does the polynomial 7 5x 4 3x 2 have?

Square root of complex number is complex. Hence, All four roots are complex.

**How many roots can a quadratic equation have?**

two

### Why is there only 1 real root when the discriminant is equal to zero?

If the discriminant is equal to zero, this means that the quadratic equation has two real, identical roots. Therefore, there are two real, identical roots to the quadratic equation x2 + 2x + 1. D > 0 means two real, distinct roots. D < 0 means no real roots.

### Why are they called quadratic equations?

In mathematics, a quadratic is a type of problem that deals with a variable multiplied by itself — an operation known as squaring. This language derives from the area of a square being its side length multiplied by itself. The word “quadratic” comes from quadratum, the Latin word for square.

**What is the square root property formula?**

The square root property is one method that can be used to solve quadratic equations. This method is generally used on equations that have the form ax2 = c or (ax + b)2 = c, or an equation that can be re-expressed in either of those forms. You can then take the square root of both sides and solve for the variable.

## Where do we use quadratic equations in real life?

For a parabolic mirror, a reflecting telescope or a satellite dish, the shape is defined by a quadratic equation. Quadratic equations are also needed when studying lenses and curved mirrors. And many questions involving time, distance and speed need quadratic equations.

## How many solutions are there if the discriminant is zero?

It tells you the number of solutions to a quadratic equation. If the discriminant is greater than zero, there are two solutions. If the discriminant is less than zero, there are no solutions and if the discriminant is equal to zero, there is one solution.

**What is the point of quadratic equations?**

Quadratic equations are actually used in everyday life, as when calculating areas, determining a product’s profit or formulating the speed of an object. Quadratic equations refer to equations with at least one squared variable, with the most standard form being ax² + bx + c = 0.

### How do you solve perfect squares?

A perfect square trinomial can be factored, so the equation can then be solved by taking the square root of both sides. Solve the equation x2 + 8x + 5 = 0 by completing the square. First, rewrite the equation in the form x2 + bx = c. Add the appropriate constant to complete the square, then simplify.

### What are the roots of the equation in number 1 What do the roots represent?

Answer: The roots are ± 12. Roots represents the square root and finding a solution to an equation.

**What is an example of a parabola in real life?**

When liquid is rotated, the forces of gravity result in the liquid forming a parabola-like shape. The most common example is when you stir up orange juice in a glass by rotating it round its axis. The juice level rises round the edges while falling slightly in the center of the glass (the axis).

## How many roots does an equation have?

To work out the number of roots a qudratic ax2+bx+c=0 you need to compute the discriminant (b2-4ac). If the discrimant is less than 0, then the quadratic has no real roots. If the discriminant is equal to zero then the quadratic has equal roosts. If the discriminant is more than zero then it has 2 distinct roots.

## What is the discriminant formula?

The discriminant is the part of the quadratic formula underneath the square root symbol: b²-4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

**What is another name for the standard form of a quadratic function?**

vertex form

### What if the discriminant is less than zero?

If the discriminant of a quadratic function is less than zero, that function has no real roots, and the parabola it represents does not intersect the x-axis.

### How do you factor perfect squares?

Factoring perfect square trinomials: ( a + b ) 2 = a 2 + 2 a b + b 2 (a + b)^2 = a^2 + 2ab + b^2 (a+b)2=a2+2ab+b2 or ( a − b ) 2 = a 2 − 2 a b + b 2 (a – b)^2 = a^2 – 2ab + b^2 (a−b)2=a2−2ab+b2 – Factoring Polynomials.

**How will you factor difference of two squares write step by step process?**

Step-by-step explanation:

- Factoring Difference of Two Squares.
- Get the square root of 25x².
- Get the square root of 36y².
- Copy the expression then change the sign to negative.
- Do the FOIL method to check if your answer is correct.
- Multiply the First terms.
- Multiply the Outer terms.
- Multiply the Inner terms.

## What is the formula for completing the square?

Completing the Square is a method used to solve a quadratic equation by changing the form of the equation so that the left side is a perfect square trinomial . To solve ax2+bx+c=0 by completing the square: 1. Transform the equation so that the constant term, c , is alone on the right side.

## What happens when B 2 4ac 0?

If (b2 – 4ac) > 0.0, two real roots exist (i.e, the equation crosses the x-axis in two places — the x-intercepts). root of a negative number). If (b2-4ac) = 0, then only one real root exists — where the parabola touches the x-axis at a single point.

**What is the square roots method?**

The square root method can be used for solving quadratic equations in the form “x² = b.” This method can yield two answers, as the square root of a number can be a negative or a positive number. If an equation can be expressed in this form, it can be solved by finding the square roots of x.

### What can you say about the roots of each quadratic equation?

Answer. Answer: the roots of each quadratic equations can be classified into; rational; irrational; real and unequal; real and equal; imaginary and unequal.

### Is a rainbow a conic section?

Conic Sections A rainbow represents a parabola because the lines going away from the center are the same distance. Rainbows can be seen after a storm, when the sun is shining. No matter dim or bright, a rainbow will always be a parabola.

**Can a quadratic equation have more than two roots?**

Theorem : A quadratic equation cannot have more than two roots. Proof : Let us consider α,β and γ are the three roots of the given quadratic equation ax2 a x 2 + bx + c = 0, where a,b,c ϵ R and a \ne 0. Then each α,β and γ will satisfy this quadratic equation.

## How do you simplify square roots?

Simplifying a square root just means factoring out any perfect squares from the radicand, moving them to the left of the radical symbol, and leaving the other factor inside the radical symbol. If the number is a perfect square, then the radical sign will disappear once you write down its root.