Question

if x-y=4 and xy=27. find the value of x raised to the power 3 - y raised to the power 3

Answer 1

Answer is -44...
Hope it helps !

Sry it is (x-y)²=x²+y²+2xy

Answer 2

x-y = 4

xy = 27

(x-y)^3 = x^3 - y^3 - 3xy(x-y)

4^3 = x^3 - y^3 - 3 × 27 × 4

64 = x^3- y^3 - 324

x^3 - y^3 = 64 + 324

= 388