Respuesta :

TSO
[tex]-(x+2y-4z)= -x-2y+4z\\\\0.5 (4x+3y-8z)= 2x+1.5y-4z\\\\\sf Using~ the~ formulas: -(a-b)=-a+b\\ and~ a (b+c)=ab+ac[/tex]
−(x+2y−4z)

=−x−2y+4z




0.5(4x+3y−8z)

=(0.5)(4x+3y+−8z)

=(0.5)(4x)+(0.5)(3y)+(0.5)(−8z)

=2x+1.5y−4z