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Factor completely and then place the factors in the proper location.
a 2 - a - 20?

2 Answers

4 votes

Answer: (a-5)(a+4)

Explanation:

User Sambomartin
by
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5 votes
This is a notable trinomial.

You have to find two numbers which summed give 1 and multiplied give 20.

In this case +4 and -5

-5+4 = -1(a)

-5*4 = -20

So (a+4)(a-5)
User Ben Pschierl
by
8.9k points

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