Question 421656
(-2x)(-3xy^2)^2

= (-2x)(-3)^2*x^2*(y^2)^2

= (-2x)*9*x^2*y^4

= -2*9*x*x^2*y^4

= -18x^3y^4


always remember......

for (-a)^n  if n is even then:  a^n

if n is odd then:  -a^n


a^x * a^y = a^(x+y)


(a^x)^y = a^(x*y)