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Select the two binomials that are factors of this trinominal x^2-x-20

User Jondow
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4 votes

Answer:

(x-5)(x+4)

Explanation:

To factor the equation, break it into two binomials which multiply to make the equation. To write these binomials (x+a)(x+b), find factors which multiply to -20 and add to -1 for a and b.

20: 1, 2, 4, 5, 10, 20

-5+4 = -1

x^2-x-20 = (x-5)(x+4)

User Nixza
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