Solve Quadratics by Factoring Extra Practice

What do the "Zeros" represent on a quadratic equation graph?

• x-intercepts

• y-intercepts

• vertex

• focus

Find the factors of 4x²-16x-9

• (2x-9)(2x+1)
• (2x+9)(2x-1)
• (4x-1)(x+9)
• (x+1)(4x-9)

Solve by factoring.

x² + 15x + 44 = 0

• {-8, 2}

• {-7, 5}

• {-11, -4}

• {-11}

Find the solutions of the quadratic equation

x²+12x+35=0 (hint: find the zeros).

• x = -5 or x = -7

• x = 5 or x = 7

• x = -35 or x = -1

• x = -9 or x = -4

3x²+9x-30=0

• x= 2, -5

• x= 5, -2

• x= -5, -2

6x²-x-2=0

• x= -2/3, 1/2

• x= 2/3, -1/2

• x= -2/3, -1/2

x²-7x=0

• x= 0, -7

• x= 0, 7

3x²-48=0

• x= 4, 4

• x= -4, -4

• x= -4, 4

What are the zeros?

• x= 0 and x= -4
• x= 0 and x= 4
• y= 0
• x= 2

Write a quadratic equation in standard form with the given roots: 1, 7

• x² - 6x - 7
• x² + 8x + 7
• x² - 8x + 7
• x² + 6x - 7