Simplify : (a+b+c)(a+b-c)
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Answer:
a(a+b+c)+b(a+b+c)+c(a+b+c)
A2+ab+AC+ba+B2+BC+CA+CB+c2
A2+B2+c2+ab+ba+bc+CB+ca+ac
A2+B2+c2+2ab+2bc+2ac
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