Posted by **Ali** on Thursday, December 3, 2009 at 11:14pm.

Why does this happen?

A=3 and b=2

A+b=c is the equation.

Multiplying both sides of the equation makes the equation a^2+2ab+b^2 which is equal to a^2+ab-ac=-ab-b^2+bc

Dividing by (a+b-c) we find a=-b or 3=-2

Why?

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