Question

efectuar las operaciones
a) (x-y+z) + (3x-2y+2z) - (y-z) - (x-y)
b) x² (y²-z²)+z²-(y²- x²)-y²+( x²-z²)
xfa ayudemen

Answer 1

a) (x-y+z) + (3x-2y+2z) - (y-z) - (x-y)=
x+y+z+3x-2y+2z-y+z-x+y=
3x-y+4z
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b) x² (y²-z²)+z²-(y²- x²)-y²+( x²-z²)=
x^2(y^2-z^2)+z^2-y^2+x^2-y^2+x^2-z^2=

x^2(y^2-z^2)-2y^2+2x^2=
x^2(y^2-z^2)-2(y^2+x^2)