Factor a^2+a-72 - Math solver

$a^{2} + a - 72$

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 72$ and whose sum is $1$ .

$- 8, 9$

Write the factored form using these integers.

$(a - 8) (a + 9)$

Factor a^2+a-72

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