Question

simplify : (a+b+c)(a+b-c)​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(a+b+c)(a+b-c)

=a(a+b-c)+b(a+b-c)+c(a+b-c)

=(a*a)+(a*b)-(a*c)+(b*a)+(b*b)-(b*c)

+(c*a)+(c*c)

=a square +AC+BA+b square- bc+ca+cb-c square

= a square + ab- ac + ab+ b square - bc + AC+bc-c square

= a square + b square- c square+ ab+ ab- bc+ bc- ac+ ac

=a square + b square - c square + 2ab