Question

 URGEEENT!!!!!  ADUCETI LA FORMA CEA MAI SIMPLA:c)y²+x²-2xy supra xz-yz+ty-xt d) xy-xz-y²+yz supra x²-xy....................Vaaa roooog ajutati-ma...dau coronita...Multumesc anticipat!

Answer 1

c)(y²+x²-2xy)/(xz-yz+ty-xt)=
=(y-x)²/[-z(y-x)+t(y-x)]=
=(y-x)²/(y-x)(t-z)=
=(y-x)/(t-z)

d) (xy-xz-y²+yz)/(x²-xy)=
=[x(y-z)-y(y-z)]/x(x-y)=
=(y-z)(x-y)/x(x-y)=
=(y-z)/x