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

Factor
x² - 9x + 20

• (x - 10)(x - 2)
• (x - 20)(x - 1)
• (x - 10)(x + 2)
• (x - 5)(x - 4)

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

What is the following called? b²-4ac

• Axis of symmetry
• Quadratic Formula
• Vertex
• Discriminant

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

The vertex of this quadratic is...

• (1,16)
• (-3,0)
• (5,0)
• (0,15)

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

1 In the equation

y = x² +5x +7,

match each leading coefficient with its correct letter.

• a=0, b=5, c=7

• a=1, b=5, c=7

• a=7, b=5, c=1

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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

Solve for x:

(x + 6)² = 49

• x=7,12

• x=±7

• x=1,-13

• x=43,-55

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

Solve by factoring: x² = 7x + 18

• -7 and -18

• 9 and 2

• 9 and -2

• 2 and 7

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

Find the Axis of Symmetry of the following Quadratic Function:

 $y=x^2+6x+5$  

•  $x=6$  

•  $x=5$  

•  $x=-5$  

•  $x=-1$  

•  $x=-3$  

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

Solve using square roots.

k² - 6 = 43

• k = √37

• k = 37 or - 37

• k = 7, k = -7

• no real solution

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

How do you know if a parabola has a minimum?

• When ‘a’ is positive there is a minimum

• When ‘a’ is negative there is a minimum

• When all the numbers in the equation are negative there is a minimum

• When all the numbers in the equation are positive there is a minimum

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