Question

what should be subtracted from x³ - 6x² - 15 + 80 so that the result is exactly divisible by x ² + x - 12​

Answer 1

x 3 - 6 x 2 - 15 x + 80 will be divisible by x 2 + x - 12 , if 4 x − 4 is subtracted from it.

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Answer 2

x-6x+3-80 is you answer