Question 427565
25x^3 = 64x

25x^3 - 64x = 0 

You need to factor out the common factor

x(25x^2 -64) =0 

Apply the zero product property

x = 0 OR 25x^2 -64 =0

x = 0 OR 25x^2 = 64

x= 0 OR x^2 = 64/25

x =0 OR x = +/- SR(64/25)

x =0 OR x = 8/5 OR x = -8/5