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N² +4n-21 (Factor by Master Product) (Diamond and Box Method)​

1 Answer

3 votes

Answer:

(n - 3) (n + 7)

Explanation:

n² + 4n - 21

Consider the form x² + bx + c. Find a pair of integers whose product is

c and whose sum is b. In this case, whose product is −21 and whose sum is 4.

-3, 7

Write the factored form using these integers.

(n - 3) (n + 7)

So, the answer is (n - 3) (n + 7)

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