1.

Simplify the equation (a+b+c)(a+b-c)

Answer»

ANSWER:

a²+b²-c²+2ab

Step-by-step EXPLANATION:

(a+b+c)(a+b-c)\\\\= a^2 + ab - ac + ab + b^2 - bc + ac + bc - c^2\\\\= a^2 + b^2 + c^2 + ab + ab -ac + ac - bc + bc\\\\= \boxed{a^2 + b^2 - c^2 + 2ab}

HOPE it HELPS.



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