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OpenStudy (anonymous):
Is the following problem simplified correctly? (5x-7)^2=25x^2-49
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OpenStudy (anonymous):
You're missing the middle term.
OpenStudy (anonymous):
5x*-7 - 7*5x
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
Also the last term should be positive. -7*-7 = + 49
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