Question

D. Solve :-(i).(a+b+c)(a+b-c)​

Answer 1

Answer:

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

a²+ab+ac+ab+b²+bc+ac+bc-c²

a²+b²+c²+2ab+2bc

Answer 2

Step-by-step explanation:

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

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

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