jeiviribus jeiviribus
  • 10-06-2021
  • Mathematics
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what are th factors of the expression below? -x +2x + 35
A. (x-5)(x-7) B. -1(x+5)(x-7) C. (x+5)(x-7) D. -1(x-5)(x+7)

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sreedevi102
sreedevi102 sreedevi102
  • 10-06-2021

Answer:

option B

Step-by-step explanation:

hope you meant - x²

You've choose factors of 35 which when added gives -2 and product gives -35. So i choose -7 and 5

[tex]-x^2 + 2 x + 35 = -1 (x^2 - 2x - 35)[/tex]

                    [tex]=-1 (x^2 - 7x + 5 x - 35)\\= -1 ( \ x(x - 7) + 5 (x - 7) \ )\\= - 1 (x+5)(x-7)[/tex]

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