Question

If x minus y is equal to minus 7 and x y is equal to minus 18 then the value of x cube minus y cube is

Answer 1

Answer:

x-y=-7

xy=-18

x³-y³=?

(x-y)³=x³-y³-3xy(x-y)

-7³=׳-y³-3(-18)(-7)

-343=x³-y³-378

x³-y³=378-343

x³-y³=35