Question

Упростить выражение

Answer 1

$2(\frac {x}{2}+\frac {y}{4})^{2}+(2x-y)^{2}=$

$2(\frac {x^{2}}{4}+2*\frac {x}{2}*\frac {y}{4}+{y^{2}}{16})+4x^{2}-4xy+y^{2}=$

$\frac {9x^{2}}{2}+\frac {9y^{2}}{8}-\frac {7xy}{2}=4,5x^{2}+1,125y^{2}-3,5xy$