expand(7x-y)3
please send me the answer urgently
Answers
Answered by
0
Answer:
343 x^3 - y^3 - 147 x^2 y + 21x y^2
Step-by-step explanation: use Identity
(a-b)^3 = a^3 - b^3 - 3 a^2 b + 3a b^2
(7x - y)^3
= (7x)^3 - y^3 - 3 (7x)^2 y + 3 (7x) y^2
= 343x^3 - y^3 - 3 * 49x^2 y + 21x y^2
= 343x^3 - y^3 - 147x^2 y + 21x y^2 = ANSWER
Similar questions