Question

Name the binomial you can multiply by (x + 9) to get the product x2 + 5x - 36.
a. 4 - x
b. x + 6
c. x - 4
d. x - 6

Answer 1

The answer is:  [C]:  " (x - 4) " .
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       " (x+9)(x-4) = x² - 4x + 9x - 36 = x² + 5x - 36 " .
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Answer 2

A way you can solve this is multiply (x+9) by all of the answer choices and see which one equals up to x2 +5x -36