Question

find (a-b+c) (a+b+c)​

Answer 1

Answer:

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+ca-ab-b^2-bc+ca+bc+c^2

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

a^2-b^2+c^2+0+2ca+0

a^2-b^2+c^2+2ca