Question

is x^2 = 100
x={-10,10} or {10}

Answer 1

first one

Answer 2

well (-10)^2 = 100 also, so both.

Answer 3

A.

Answer 4

so how do you know if there are parentheses around the -10

Answer 5

um...for just x^2 = 100. you assume both. the difference is are you squaring -10 or are you doing something like 0 - 10^2

Answer 6

umm k

Answer 7

you know there's brackets, because x^2 = x * x

Therefore -10 * -10 = (-10)^2

Answer 8

"A negative times a negative equals a positive"
10 x 10 equals 100, and -10 x -10 also equals 100.

Answer 9

^\[A^2\]