Question

(a+b+c)(a+b-c) ?. simplify this question​

Answer 1

Answer:

Step-by-step explanation:

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

= (a^2 + ab + ac)+(ba + b^2 + bc)+(ca + cb + c^2)

= a^2 + ab + ac + ba + b^2 +bc + ca + cb + c^2 (now, add underlined (similar)ones)

= a^2 + 2ab + ac + b^2 +bc + ca + cb + c^2

= a^2 + 2ab +2ac + b^2 + bc + cb + c^2

= a^2 + 2ab + 2ac + b^2 +2bc +c^2

hope it helps uhh ... :)