Question

please help only for class xii not for below class give answer step by step​

Answer 1

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X= -1. X= 3

(x) = x³ - 3x² - 9x

(x) = 3x² - 6x - 9

Solving 3x² - 6x - 9

=> 3x²- 6x - 9 = 0

=> x² - 2x -3 = 0

=> x²- 3x + x - 3 = 0

=> x(x - 3) + 1(x - 3) = 0

=> (x + 1)(x - 3) = 0

=> x = -1 and x = 3