Solving Quadratic Equations by Factoring

What technique is used to solve x^2 - 49 = 0?

• Difference of perfect squares

• Completing the square

• Quadratic formula

• Factoring trinomials

What is the solution for 3x^2 - 75 = 0 after factoring?

• x = -3 and x = 3

• x = 3

• x = 5

• x = -5 and x = 5

How do you factor x^2 - 2x - 15?

• x + 5 and x - 3

• x - 5 and x + 3

• x - 5 and x - 3

• x + 5 and x + 3

What are the solutions for x^2 + 3x - 28 = 0?

• x = 4 and x = 7

• x = 4 and x = -7

• x = -4 and x = -7

• x = -4 and x = 7

What is the first step in factoring 8x^2 + 2x - 15?

• Use the quadratic formula

• Factor by grouping

• Find the GCF

• Multiply a and c

What numbers multiply to -120 and add to 2?

• 20 and -6

• 15 and -8

• 10 and 12

• 12 and -10

After replacing 2x with 12x and -10x, what is the next step?

• Factor by grouping

• Find the GCF

• Use the quadratic formula

• Solve for x

What is the solution for x in 2x + 3 = 0?

• x = -3/2

• x = -2/3

• x = 3/2

• x = 2/3

Using the quadratic formula, what is the solution set for x^2 - 2x - 15 = 0?

• x = 5, x = -3

• x = -5, x = 3

• x = -3, x = 5

• x = 3, x = -5

What are the solutions for 8x^2 + 2x - 15 using the quadratic formula?

• x = -5/4, x = 3/2

• x = 5/4, x = -3/2

• x = 5/4 and x = 3/2

• x = -5/4 and x = -3/2