Quadratic Formula

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• D

Tags

CCSS.HSA-REI.B.4B

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• B
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• D

Tags

CCSS.HSA-REI.B.4B

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

• No Real Solution

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Tags

CCSS.HSA-REI.B.4B

What should you do first in solving this equation?

x² + 6x - 13 = 3

• Factor

• Write down: a = 1, b = 6, c = -13

• Subtract 3 from both sides.

• Add 3 to both sides.

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula...

9x² = 4 + 7x

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• No solution

Tags

CCSS.HSA-REI.B.4B

Desean begins to use the quadratic formula to solve the following equation.

 $x^2-3x=9$  

Which expression shows a step in solving the above equation?

•  $\frac{3\pm\sqrt{45}}{2}$  

•  $\frac{-3\pm\sqrt{45}}{2}$  

•  $\frac{3\pm\sqrt{-27}}{2}$  

•  $\frac{-3\pm\sqrt{-27}}{2}$  

Tags

CCSS.HSA-REI.B.4B

Look at the equation below.

 $x^2+2x-5=2$  

Which values of x satisfy the equation?

•  $-1\pm2\sqrt{2}$  

•  $1\pm2\sqrt{2}$  

•  $-1\pm2i\sqrt{2}$  

•  $1\pm2i\sqrt{2}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Look at the equation below.

 $x^2+5x+7=0$  

What are the solutions of the equation?

•  $\frac{-5\pm\sqrt{3}}{2}$  

•  $\frac{-5\pm i\sqrt{3}}{2}$  

•  $\frac{-5\pm\sqrt{53}}{2}$  

•  $\frac{-5\pm i\sqrt{53}}{2}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve:

 $x^2+10x+35=0$  

•  $-5\pm2i\sqrt{5}$  

•  $-5\pm i\sqrt{5}$  

•  $-5\pm2i\sqrt{10}$  

•  $-5\pm i\sqrt{10}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve using the quadratic formula.  $f\left(x\right)=2x^2-4x+7$  

•  $\frac{2\pm2i\sqrt{10}}{2}$  

•  $\frac{4\pm\sqrt{40}}{4}$  

•  $\frac{2\pm i\sqrt{10}}{2}$  

•  $\frac{2\pm2i\sqrt{40}}{4}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7