Question

Which of the following numbers are square roots of 100?
check all that apply ..
a. -10
b. -50
c. 10
d. 50

Answer 1

$\sqrt{100}=10\ \ (c.)\ \ because\ 10^2=100$

Answer 2

Well think what number when multiplied by itself = 100.

50x50=2500 so it has to be 10.

However, -x-=+ so -10x-10 is also 100.

Therefore 10 and -10 are the square roots of 100, so a and c.