Question

Given a≠±b and a^2−b^2/a+b =12, find a−b.

Answer 1

`image`

a - b = 12

Hope this helps.

Answer 2

`(a^2 - b^2)/(a+b) = 12`

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Factorise a² - b² :
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`((a+b)(a-b))/(a+b) = 12`

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Crossed out common factors, (x + a) :
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`a- b = 12`