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4 votes
(a^2-ax+bx-ab)/(a^2+ax-bx-ab)*(a^2+ax+ab+bx)/(a^2-ax-ab+bx)

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User Deubaka
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1 Answer

5 votes

(a^2-ax+bx-ab)/(a^2+ax-bx-ab) \cdot (a^2+ax+ab+bx)/(a^2-ax-ab+bx) = (1)/(a(a+x)-b(x+a)) \cdot (a(a+x)+b(a+x)) = (1)/(a-b) \cdot (a+b) = (a+b)/(a-b).
answered
User Cspam
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