Q34

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Q34

34In the product of(9x² + 15 - x) and (-1 - x + x ² ), if A, Band G are the coefficients of x³ , x² and x respectively, then the value of (A + B - C) is

Option : D
Explanation : (9x² + 15 - x)(-1 - x + x²)
= -9x² - 9x³ + 9x⁴ -15 -15x + 15x² + x + x² - x³
= 9x⁴ - 10x³ + 7x² - 14x -15
A = -10, B= 7, C = -14
Now, A + B + C = -10 +7 + 14
= 11

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