Radicals

Which of the following is a perfect square?

• 10

• 25

• 50

• 89

Tags

CCSS.8.EE.A.2

Which of the following in not a perfect square?

• 49

• 81

• 111

• 144

Tags

CCSS.8.EE.A.2

√100=___

• + 50 only

• ± 50

• ± 10

• + 10 only

√16=___

• + 8 only

• ± 8

• ± 4

• + 4 only

√1=___

• + .5 only

• ± .5

• ± 1

• + 1 only

√64=___

• + 6 only

• ± 6

• ± 8

• + 8 only

Tags

CCSS.8.EE.A.2

√36=___

• + 6 only

• ± 6

• ± 18

• + 18 only

Which of the following problems are TRUE: (click all that apply)

• 
  

  $5\times5=25$

• $-5\times-5\ =25$

• $5^2=25$

• $-5^2=25$

• $\left(-5\right)^2=25$

Why is the $\sqrt{25}=\pm5$ and not just +5?