Question

If 3x -2y =8 and xy = 14, Find the value of 27x3

-8y3​

Answer 1

Answer:

27x³-8y³=2528

Step-by-step explanation:

3x-2y=8

Cubing on both the sides

(3x-2y)³=(8)³

(3x)³-(2y)³-3(3x)(2y)(3x-2y)=(8)³

27x³-8y³-18xy(3x-2y)=(8)³

27x³-8y³-(18)(14)(8)=512

27x³-8y³-2016=512

27x³-8y³=512+2016

27x³-8y³=2528