GRADE 9 REVIEW

For what values of a will make the quadratic equation ax² + bx + x = 0 be unreal?

• 1

• 2

• 3

• 0

Which of the equations below is NOT a quadratic equation?

• 7x² + 8x – 5 = 0

• 4x³ – 2x + 5 = 0

• -3x² + 44x + 10 = 0

• 9x² = 0

A quadratic equation is an equation on a degree of _____.

• 1

• 2

• 3

• 4

Find the value of x in the quadratic equation x² – 144 = 0.

• 12

• -12

• 16

• -16

Joshua is trying to solve the quadratic equation x² – 25 by extracting the roots and he got positive 5 as one of the two roots. What is the other root?

• 5

• -5

• 15

• -25

Given the quadratic equation x² + 7x + 12, what are its factors?

• (x + 2)(x + 6)

• (x + 3)(x + 4)  

• (x + 12)(x + 1)

•  (x – 4)(x – 3)

One of the factors of x² – 8 is x. What is the other factor?

• x + 4

• x - 1

• x - 2

• x - 4

For what value of k will make the statement (x² + 8x + k = 0) a complete square of a binomial?

• 4

• 8

• 12

• 16

If the equation x² + _____ + 9 is a perfect square trinomial, what is the middle term?

• 2x

• 3x

• 4x

• 6x

Using the discriminant formula, describe the nature of the roots of the quadratic equation x² + 10x + 25 = 0.

• Real and Equal

• Real and Unequal

• Imaginary

• Irrational