How do we solve using perfect square trinomials

What is the factored form of a^2 - b^2?

• a^2 + b^2

• (a + b)^2

• (a - b)^2

• (a + b)(a - b)

Which of the following is a perfect square trinomial?

• x^2 + 10x + 21

• x^2 + 8x + 15

• x^2 - 4x + 4

• x^2 + 6x + 9

What is the factored form of the expression x^2 + 8x + 16?

• (x + 4)(x - 4)

• (x + 8)(x + 2)

• (x + 2)(x + 2)

• (x + 4)(x + 4)

How do you solve the equation x^2 = 36?

• Add 36 to both sides

• Multiply both sides by 36

• Subtract 36 from both sides

• Take the square root of both sides

When solving x^2 = 36, why must you consider both positive and negative roots?

• Because squaring a number always gives a positive result

• Because the equation has no solution

• Because both 6 and -6 squared equal 36

• Because only positive numbers have square roots

What is the first step in solving an equation like (x - 3)^2 = 16?

• Subtract 3 from both sides

• Square both sides

• Take the square root of both sides

• Add 3 to both sides

When finding the zeros of a function, what should you set the function equal to?

• 0

• 1

• Infinity

• x