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

Solve the equation by factoring:
x²-6x+8=0

• 2, 4
• -2, -4
• -2, 4
• 2, -4

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

A diver is standing on a platform above the pool. He jumps form the platform with an initi8al upward velocity of 8 ft/s. Use the formula h t = −16 t² + 8t + 24, where h is his height above the water, t is the time, v is his starting upward velocity, and s is his starting height. How high is the platform?

• .25 ft
• 24 ft
• 25 ft
• 8 ft

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

Find the vertex of 
f(x) = -x² - 4x + 12

• (-2, 16)
• (2, 0)
• (2, 4)
• (-2, 4)

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

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

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

Lava coming from the eruption of a volcano follows a parabolic path.  The height h in feet of a piece of lava t seconds after it is ejected from the volcano is given by h(t) = -t² + 16t + 936.  After about how many seconds does the lava reach its maximum height?

• 12
• 20
• 8
• 5

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

If the discriminant is positive, then the quadratic has:

• 1 Real Solution
• 2 Real Solutions
• Half a Solution
• 2 Imaginary Solution

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

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

• No Real Solution

• 
• 
• 

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

The parabola y = x² - 2x + 4

• will have a minimum vertex.

• will have a maximum vertex.

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

 $x^2+8x+4$  Factored is

•  $\left(x+2\right)\left(x+4\right)$  

• Not factorable

•  $\left(x-2\right)\left(x+4\right)$  

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

The first step in solving quadratic equations is to . . .

• factor

• write the equation in standard form

• use quadratic formula

• complete the square

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