Answer:
x^5
Step-by-step explanation:
Because the area of a square can be found by squaring one of its side lengths, we can set up this equation:
(x)^2 = x^10
Using properties of exponents, I know that I can turn the exponent of a similar base from 2 to 10 by multiplying it by 5. Therefore, I know that the side length of this square is x^5.
