Practicing Success
Practicing Success
CUET Preparation Today
The coefficient of y in the expansion of (2y - 5)3, is: |
150 50 -30 -150 |
150 |
(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. |
