Algebra
posted by Micah on .
Find the following. Assume that variables can represent any real number.
SqRt(a+8)^2=
8a^2?

sqrt[(a+8)^2] = a+8 or a8

No, when we take the sqrt of a squared term, we get that term, or its negative.
So, sqrt(x²)=x or sqrt(x²)=x
So for this question we get that:
sqrt((a+8)²)=a+8 or sqrt((a+8)²)=a8