Question

(a-b-c) (a+b+c) tell me pls​

Answer 1

Answer:

a^2-b^2-c^2-2bc

Step-by-step explanation:

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

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

=a^2+ab+ac-ba-b^2-bc-ca -bc-c^2

=a^2-b^2-c^2-2bc

I think it will help you