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OpenStudy (anonymous):
(w+7)^2
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OpenStudy (anonymous):
w^2+14w+49
TheSmartOne (thesmartone):
(a+b)^2=a^2+2ab+b^2 so in your case a is w and b is 7 so just substitute (w+7)^2=w^2+2(w)(7)+7^2 (w+7)^2=w^2+14w+49
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