The coefficient of y in the expansion of (2y - 5)3, is:
Answer & explanation
Correct answer: option 1
(2y – 5)3
We know that = (a - b)3 = a3 - b3 - 3ab(a-b)
= (2y)3 – 53 – 3 × 2y × 5 (2y – 5)
= 8y3 – 125 – 60y2 + 150y
Coefficient of y = 150.
The coefficient of y in the expansion of (2y - 5)3, is:
Correct answer: option 1
(2y – 5)3
We know that = (a - b)3 = a3 - b3 - 3ab(a-b)
= (2y)3 – 53 – 3 × 2y × 5 (2y – 5)
= 8y3 – 125 – 60y2 + 150y
Coefficient of y = 150.