(a+b+c)^2 का formula

 (a+b+c)^2 = (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+cb+c^2

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

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

(a-b+c)^2 का formula

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

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

(a-b+c)^2=a^2+b^2+c^2-2ab-2bc+2ca