Question

if 3x - 2y=5 and xy =5 find 27xcube - 8ycube

Answer 1

hey here is ur answer

(3x-2y)^2=5^2
9x^2+4y^2=25+2(5)
=35


27x^3-8y^3= (3x-2y)[(9x^2+4y^2-xy]
=5(35-5)
=5(30)
=150

I hope this helps u