Question

Find the value of
(a+b+c) (a+b-c)​

Answer 1

Answer:

a^2+b^2+2ab-c^2

Step-by-step explanation:

(a+b+c) (a+b-c)=(a+b)^2-c^2

i.e a^2+b^2+2ab-c^2

Answer 2

Answer : (a+b)²-c²

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

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

=a²+ab -ac +ba+ b²- bc+ca+bc- c²

=a²+b²-c²+2ab

= (a+b)²-c²

Step-by-step explanation:

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