Question

ayuda por favor es urgente

Answer 1

 $( h - g + j ) ^{2} = h^{2} + g^{2} + j^{2} - 2 h g + 2 h j - 2 g j$
$\left(1-2x+3y\right)^2=1-4x+6y+4x^2-12xy+9y^2$

$\left(0.2-x-y\right)^2= -0.4x+x^2+2xy-0.4y+y^2+0.04$