How do you factor the trinomial $a^2 +3a - 10$ ?

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Answer 1 · 2016-01-24T16:35:34

(a + 5)(a - 2)

Use the product-sum method to determine the numbers 5 and -2.
5 x -2 = -10
5 + -2 = +3

How do you factor the trinomial a^2 +3a - 10 a^2 +3a - 10 ?