Verified answer

√25 = 5, because 5²=25

√x^4 = x^2 for the same reason

that's how √ works.

If it helps, remember "two inside, then come out as one"

√(25x^4) means √(5*5*x*x*x*x)

two 5's inside, come out as one 5

four x's inside, they come out as two x's = x²

therefore . . . √(25x^4) = 5x²

hope this helps! ;)

Assuming that you meant

√(25x^4), this is the same as √25√(x^4)

√(5*5) √(x² * x²)

5x²