Question

14. Expansion of (3x - 2y) is -
(A) 27x3 - 8y3 - 54x2y + 36xy2
(B) 9x2 + 8y3 - 54x2y - 36xy?
(C) 9x2 - 8y3 + 54.x2y + 36xy2
(D) None of these​

Answer 1

Answer:

(A) 27x3 - 8y3 - 54x2y + 36xy2

Step-by-step explanation:

(3x - 2y)^3

(3x)^3 -(2y)^3 -3×(3x)^2×2y + 3×(3x)×(2y)^2

27x3 - 8y3 - 54x2y + 36xy2