CCSS.Math.Content.HSA.REI.B.4

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

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CCSS.Math.Content.HSA.REI.B.4

Suzie solves the equation below:
x² + 4x - 12 = 2
(x - 2)(x + 6) = 2, 
by setting x -2 = 0 and x + 6 = 0. 
Her solutions are x = 2 and x = -6.
Is Suzie correct? Why or why not?

• Yes, she factored correctly and then used the zero product property
• Yes, she factored correctly and then square rooted.
• No, she did factor correctly, but she can't use the zero product property as shown.
• No, she didn't factor correctly so the rest of her work is wrong. 

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CCSS.Math.Content.HSA.REI.B.4

Solve by factoring.
z² - 18z + 81 = 0

• z = 9
• z = -9
• z = 9 or z = -9

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CCSS.Math.Content.HSA.REI.B.4

Solve:
x² - 49 = 0

• x = -7, x = 7
• x = -7
• x = 7
• x = -7, x = 1

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CCSS.Math.Content.HSA.REI.B.4

Use the quadratic formula to find the solutions for
y = 2x² - 9x + 5

• -8.14 and -6.14
• 4.07 and 3.07
• 3.85 and 0.65
• ZERO solutions

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CCSS.Math.Content.HSA.REI.B.4

Solve for x

• 1/3

• -5.5

• 5.5

• 2.5

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CCSS.Math.Content.HSA.REI.B.4

Solve

x² + 2x - 20 = 4

• x = -6, x = 4

• x = 6, x = -4

• x = 12, x = -2

• x = 8, x = -3

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CCSS.Math.Content.HSA.REI.B.4

What are the roots of the quadratic equation 2x² + 6x - 20 = 0?

• 2 and 5

• -2 and 5

• 2 and -5

• -2 and -5

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CCSS.Math.Content.HSA.REI.B.4

1 What does the discriminant tell us?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

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CCSS.Math.Content.HSA.REI.B.4

The graph of y = x² - 2x - 8 is shown.
What are the solutions to x² - 2x - 8 = 0?

• x = 1 and x = -9
• x = 0 and x = -8
• x = -2 and x = 4
• x = -4 and x = 2

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CCSS.Math.Content.HSA.REI.B.4