√4:(32x^11y^15)/√4:(2x^3y^-2) for this equation i got =2x^2y^4√4:y

and in my worksheet it says enter it: √b, enter sqrt(b). For example: For 4√3 enter 4sqrt(3) so how would i enter my answer

well, since √4 = 2, why worry about it?

2x^2y^4√4:y = 4x^2y^4:y = 4x^2y^3:1 = 4x^2y^3

Be sure this is the correct answer. Your original expression has two : symbols, but your answer only has one. Are there any other typos?