Question

simplify (a+b+2c)^2 - (a-b+c)^2​

Answer 1

(a+b+c)^2-(a-b-c)^2
=[(a^2+b^2+c^2+2ab+2bc+2ca)-(a^2-b^2-c^2-2ab-2bc-2ca)]
=a^2+b^2+c^2+2ab+2bc+2ca-a^2+b^2+c^2+2ab+2bc+2ca
=> 2b^2+2c^2+4ab+4bc+4ca

Hope this helps you !!!
Thank you !!!

Answer 2

Answer:

3c^2+4ab+6bc-2ca