Factor 2q+q^2-63

Math
2q+q2-63
Let u=q. Substitute u for all occurrences of q.
2u+u2-63
Factor 2u+u2-63 using the AC method.
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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 -63 and whose sum is 2.
-7,9
Write the factored form using these integers.
(u-7)(u+9)
(u-7)(u+9)
Replace all occurrences of u with q.
(q-7)(q+9)
Factor 2q+q^2-63

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