Question

how to expand (a-2b-3c)

Answer 1

We will solve this question with the help of formula which is.
a^2+b^2+c^2+2ab+2bc+2ca.

(a)^2 + (-2b)^2+ (-3c)^2 + 2(a)(-2b) + 2(-2b)(-3c)+2(-3c)(a)
=
(a)^2+(-4b)+(9c)+(-4ab)+(12bc)+(-6ca) ans..


Thanks.