Quadratic Equations Quiz

What is the value of x in the equation x^2 - 49 = 0?

• x = 0

• x = ±7

• x = 7

• x = -7

Tags

CCSS.8.EE.A.2

In the equation 3x^2 - 75 = 0, what is the greatest common factor (GCF) that can be factored out?

• 15

• 3

• 5

• 25

Tags

CCSS.HSA-REI.B.4B

Which pair of numbers multiply to -15 and add to -2 in the trinomial x^2 - 2x - 15?

• -3 and 5

• 3 and -5

• -5 and 3

• 5 and -3

What is the quadratic formula used to solve quadratic equations?

• x = -b ± √(b^2 - 4ac) / 2a

• x = b ± √(b^2 - 4ac) / 2a

• x = -b ± √(b^2 - 4ac) / a

• x = -b ± √(b^2 + 4ac) / 2a

Tags

CCSS.HSA-REI.B.4B

Using the quadratic formula, what are the solutions for the equation 8x^2 + 2x - 15 = 0?

• x = 3/2 and x = -5/4

• x = 4/5 and x = -2/3

• x = 5/4 and x = -3/2

• x = 2/3 and x = -4/5

Tags

CCSS.HSA-REI.B.4B