( a+ b+ c ) ( a+ b - c )
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Answered by
10
a^2+ab-ac+ab+b^2-bc+ac+bc-c^2
a^2+2ab+b^2-c^2
(a+b)^2-c^2
a^2+2ab+b^2-c^2
(a+b)^2-c^2
Answered by
18
(a+b+c) (a+b-c)
a2+ab-ac+ab+b2-bc+ac+bc-c2
a2+b2-c2+2ab
(a+b)2-c2
a2+ab-ac+ab+b2-bc+ac+bc-c2
a2+b2-c2+2ab
(a+b)2-c2
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