Question

divide by division method.
(x ^ 2 + 4x - 21) by (x - 3)​

Answer 1

Answer:

Quotient = x+7

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Answer 2

Answer:

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$= \frac{x {}^{2} + 4x - 21}{(x - 3)} \\ = \frac{x {}^{2} + 7x - 3x - 21{}^{} }{(x - 3)} \\ = \frac{x(x + 7) - 3(x + 7)}{(x - 3)} \\ = \frac{(x + 7)(x - 3)}{(x - 3)} \\ = (x + 7)$

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