Find the coefficient of x2 in (2x + y)3
Answer & explanation
Correct answer: option 4
(2x + y)3 = 8x3 + y3 + 6xy (2x + y)
= 8x3 + y3 + 12yx2 + 6xy2
⇒ Coefficient of x2 = 12y
Find the coefficient of x2 in (2x + y)3
Correct answer: option 4
(2x + y)3 = 8x3 + y3 + 6xy (2x + y)
= 8x3 + y3 + 12yx2 + 6xy2
⇒ Coefficient of x2 = 12y