Question

if 4x-5z=2 and xz=6,then 64x^3-125z^3​

Answer 1

Answer:

(4x-5z)^3=64x^3-125z^3-3(4x)(5z)(4x-5z)

put the given value

(2)^3=64x^3-125z^3-(60)(6)(2)

(8)=64x^3-125z^3-720

8+720=64x^3-125^3