Solving Quadratics

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Convert x²-6x+9 to factored form and identify the solution.

• (x-3)(x-3); x=3
• (x+3)(x+3); x=-3
• (x+4)(x+2); x=-4, -2
• Not factorable

Convert x²-9x+20 to factored form and solve.

• (x-10)(x+2); x=-2, 10
• (x+4)(x+5); x=-5, -4
• (x-4)(x-5); x=4, 5
• Not factorable

What is another word for zeros?

• y-intercepts
• roots
• vertex
• axis of symmetry

Identify the a, b and c values for this equation:
3x² - 8x + 15 = 0

• a=3, b=8, c=0
• a=3, b=-8, c=15
• a=3, b=8, c=15

Solve for a: a² + 2a - 24 = 0

• a = -6

  a = 4

• a = 6

  a = -4

• a = 12

  a = -2

• a = 8

  a = -3

What are the roots of the function?

• x = 4 and x = -1

• (-4, 1)

• x = -4 and x = 1

• (-1, 4)

• r = -3

  r = 4

• r = 3

  r = 4

• r = -4

  r = -3

• r = -3

Use the quadratic formula to find the solutions for
y = -x² - 5x + 12

• -4.9 and -0.1
• -8.54 and 8.54
• -0.45 and 3.55
• -6.77 and 1.77

Name "c" for the equation
4x² - 5x + 7 = 10

• 7
• 17
• -5
• -3