Question

write the expanded form of (a+2b+c)2​

Answer 1

the expanded form will be:

${a}^{2} + {4b}^{2} + {c}^{2} - 4ab - 2ac - 4bc$

Answer 2

Answer:

Formula,

(a+b+c)^ 2 =a2 +b2 +c2+2ab+2bc+2ca

Given,

(a+2b+c) 2 =a 2 +(2b) 2 +c 2

+2a(2b)+2(2b)c+2ca

=a 2 +4b 2 +c2 +4ab+4bc+2ac