Applying roots

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• 1

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Answer explanation

If the square has an area of 81, then the length of each side is 9.

(5x-7)2

X= 5

• 324

• 514

• 876

• 835

 $x^2-23=\ 25$  

•  $6\sqrt{8}$  

•  $4\sqrt{2}$  

•  $\sqrt{2}$  

•  $4\sqrt{3}$  

Solve the equation.  Round to the nearest tenth:

 $-21=15+2z^2$  

•  $z\approx\pm4.3$  

•  $z=\pm6$  

•  $z=-4.3$  

• No Solutions

Find the value of y.

• $5\sqrt{4}$

• 
  $3\sqrt{5}$
  

• $4\sqrt{5}$

• $6\sqrt{8}$

Solve using your method of choice.

4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

3x²+12= 39 (solve using square roots)

• x = √27

• x = ±3√27

• x = ±3

• x = ±9

Identify the value of 'b'

6x²-12=0

• 0

• 6

• -12

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