Mathematics
antwonfanzii
14

Solve by factoring. x2 - 49 = 0

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(1) Answers
Bao873

remember difference of 2 perfect squares a^2-b^2=(a-b)(a+b) (x)^2-(7)^2=(x-7)(x+7) set to zero x-7=0 x=7 x+7=0 x=-7 x=-7 or 7

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