Question

Is (x + 9) a factor of x2 + 4x – 285?
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Answer 1

Answer:

No

Step-by-step explanation:

If x+9 was a factor, for x=-9, x^2+4x-285 would have been equal to 0.

But for x=-9, x^2+4x-285=

(-9)^2+4X(-9)-285

= 81-36-285

=-240 which is not equal to 0.

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