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Si a2 - b2 = 7 (a + b), entonces a - b =
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Si a2 - b2 = 7 (a + b), entonces a - b =

User Miku
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I’m very confused I tried
User Tomer Geva
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(a + b)(a - b) = 7(a + b)

Divide sides by ( a + b )


((a + b)(a - b))/((a + b)) = (7(a + b))/((a + b)) \\


(a - b) = 7


a - b = 7

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User Bond
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