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OpenStudy (anonymous):
Use the quadratic formula to solve (x − 4)(x + 5) = 7.
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OpenStudy (shane_b):
So where would you start?
OpenStudy (alexwee123):
(x − 4)(x + 5) = 7. x^2 +x-20=7 x^2 +x-27=0 |dw:1345074517155:dw| can you solve it out now? @jorgereza9
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