maths
posted by hitarthi on .
Factorize 125+8x^3+90xy27y^3
I tried till :
5^3+(2x)^39y(10x+3y^2)
got stuck here as there is no commom cuming 5 and 2x n last sction.

I see a lot of perfect cubes there
8x^3  27y^3 = (2x3y)(4x^2+6xy+9y^2)
Hmmm. No joy there.
wolframalpha.com factors it, but I can see no motivation for trying (2x3y+5) as a factor.