Question

Expand (2x+y+3)square using suitable identity

Answer 1

★ For the solution of this question,please see the attachment .

▪︎Identity used in this question are given below⤵️

$\color{red}{ ({a} + b + c) ^{2} } = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ca$