Solving Quadratic Equations

Solve

x² + 13x + 12 = 0

• x = -12, -1

• x = 12, 1

• x = 13, 1

• x = -13, -1

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.

Tags

CCSS.HSA-REI.B.4B

Solve the equation: 
5x² - 35x + 60 = 0

• x = 3,  -4
• x = -3,  4
• x = 3,  4
• x = -3,  -4

Tags

CCSS.HSA-REI.B.4B

Solve the equation:
4x²+2x - 6 = 0

• x = 1 & -1.5
• x = -1 & 1.5
• x = (-2 ±√92)/8
• x = (-2 ± √100)/8

Tags

CCSS.HSA-REI.B.4B

Factor x²-6x-40

• (x-10)(x+4)
• (x+10)(x-4)
• (x-8)(x+5)
• (x+8)(x-5)

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Solve the following quadratic equation...

x² - 14x + 24 = 0

• x = 12

  x = 2

• x = 4

  x = 6

• x = 3

  x = 8

• x = 1

  x = 24

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² - 13x + 30 = 0

• x = 10

  x = 3

• x = -10

  x = -3

• x = 5

  x = 6

• x = -5

  x = -6

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² - 7x - 30 = 0

• x = 10

  x = -3

• x = -10

  x = 3

• x = -5

  x = 6

• x = 5

  x = -6

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² - 2x - 15 = 0

• x = 5

  x = -3

• x = -5

  x = 3

• x = -15

  x = 1

• x = 15

  x = -1

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² + 2x - 24 = 0

• x = 6

  x = -4

• x = -6

  x = 4

• x = -8

  x = 3

• x = 8

  x = -3

Tags

CCSS.HSA-REI.B.4B