Question

Write(3a+4b+5c)wholecube in expanded form.

Answer 1

(3a+4b+5c)2

using (x+y+z)2
let x=3a
y=4b
z=5c
and your question is solve

Answer 2

you can take it as (a+b+c)^+(a+b+c)
::a2+b2+c2+2ab+2bc+2ca+a+b+c
(3a)^+(4b)^+(5c)^+2*3a*4b+2*4b*5c+2*5c*3a+3a+4b+5c
:9a^+16b^+25c^+24ab+40bc+30ac+3a+4b+5c