УПРОСТИТЕ :y(2 степень)+x(2 степень)-2xy________________________xz-yz+ty-xt

Question

УПРОСТИТЕ :
y(2 степень)+x(2 степень)-2xy
________________________
xz-yz+ty-xt

Answer 1

\frac{y^2+x^2-2xy}{xz-yz+ty-xt}=\frac{(x-y)^2}{(xz-yz)+(ty-xt)}=\frac{(x-y)^2}{z(x-y)+t(y-x)}=\frac{(x-y)^2}{(z+t)(x-y)}=\frac{(x-y)}{(z+t)}

 

 

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