Question

(3x-7y) cube solution

Answer 1

Answer:

27x³-343y³-189x²y+441xy²

Step-by-step explanation:

(3x-7y)³=(3x)³-(7y)³-3×3x×7y(3x-7y)

= 27x³-343y³-63xy(3x-7y)

= 27x³-343y³-189x²y+441xy²