Question

my question is
(3a+2b-7c)square
now i have to expand it but cant understand how to do it

Answer 1

Answer

9a^2 + 4b^2 + 48c^2+ 2(6ab - 14bc - 21ca)

Step-by-step explanation:

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

=> (3a+2b-7c)square = 9a^2 + 4b^2 + 48c^2+ 2(6ab - 14bc - 21ca)