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

To solve by completing the square, what needs to be moved in this equation?
x² = 9 - 4x

• the -4x
• the 9
• the x²

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

Solve
4m² - 100 = 0

• m=25, -25
• m=96
• m=5, -5
• m=-96

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

What is this?

• This is the speed of light formula.
• This is the quadratic formula.
• This is the zero product property.
• This is scary.

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

Convert x²-9x+20 to factored form and solve.

• (x-10)(x+2); x=-2, 10
• (x+4)(x+5); x=-5, -4
• (x-4)(x-5); x=4, 5
• Not factorable

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

A ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function
 h = -16t² + 64t + 960.
What is the maximum height?

• 960 feet
• 1008 feet
• 1024 feet
• 1152 feet

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

Find the axis of symmetry of f(x)= -2x²-16x+3.

• x= 4
• x=-4
• y= 4
• y=-4

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

If the discriminant equals 0, then the quadratic has:

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

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

What is the discriminant of -2x² − x − 1 = 0

• 76

• -7

• 9

• none of these

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

Use the graph to determine the solutions of the equation

0 = x² - 5x + 1

• 0 and 5

• 0.5 and 4.5

• 0.2 and 4.8

• 1 and 7

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

Solve Using the Quadratic Formula

x² + 4x - 40 = -8

• -10 & -4

• -8 & 4

• -4 & 10

• 8 & -4

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