Solving quadratic equations

Factor:  x² + 13x + 30

• (x + 3)(x + 10)
• (x + 5)(x + 6)
• (x + 2)(x + 15)
• (x + 1)(x + 30)

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

Factor:  x² + 13x - 48

• (x + 3)(x - 16)
• (x + 16)(x - 3)
• (x + 4)(x - 12)
• (x + 12)(x - 4)

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

What are the solutions to this equation? (x-3)(x+2)=0

• x=3,-2
• x=-3,2
• x=2,3
• x=3,2

Tags

CCSS.HSA-REI.B.4B

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5

Tags

CCSS.HSA-REI.B.4B

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6
• x = 3 and x = -6
• x = -9 and x = 2
• x = 9 and x = -2

Tags

CCSS.HSA-REI.B.4B

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

• Get factored form
• Find two numbers which add to make 6 and multiply to make -13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Express in factored form:

3x² - 5x - 2 = 0

• (3x + 1)(x - 2) = 0

• (3x + 2)(x - 1) = 0

• (3x - 1)(x + 2) = 0

• (3x - 2)(x + 1) = 0

If the factored form of an equation is

(2x + 3)(x - 1) = 0

then what are the solutions?

You may have multiple answers. Choose all that apply.

• x = -3

• x = -2/3

• x = 1

• x = -1/3