What is the factorization of the polynomial below? -X^2-15x – 56

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Question

What is the factorization of the polynomial below?
-X^2-15x – 56

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Mathematics Trung Dũng 4 years 2021-08-27T07:56:18+00:00 2021-08-27T07:56:18+00:00 2 Answers 12 views 0

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Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Answer*

thienthi · Answer 1 · 2021-08-27T07:57:48+00:00

thienthi

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2021-08-27T07:57:48+00:00 August 27, 2021 at 7:57 am

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Answer:

$-\left(x+7\right)\left(x+8\right)$

Step-by-step explanation:

$-X^2-15x - 56\\\\\mathrm{Factor\:out\:common\:term\:}-1\\\\=-\left(x^2+15x+56\right)\\\\=-\left(x+7\right)\left(x+8\right)$

thnahdat · Answer 2 · 2021-08-27T07:58:08+00:00

thnahdat

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2021-08-27T07:58:08+00:00 August 27, 2021 at 7:58 am

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Answer:

$-(x+7) (x+8)$

Step-by-step explanation:

$-x^{2} - 15x-56$

Write – 15x as a difference

$-x^{2} -7x-8x-56$

Factor out – x from the expression

$-x(x+7)-8x-56$

Factor out – 8 from the expression

$-x (x+7)-8(x+7)$

Factor out – (x + 7) from the expression

$-(x+7)x(x+8)$