Question

Aduceti expresia la forma cea mai simpla (x-y supra x²-xy - 1 supra x²-y² : x+y supra(y-x²)) dau coroana !!!

Answer 1

x-y/x²-xy-1/x²-y²/x +y/(y-x²)= (numitorul comun este x²(y-x²))
=[x³(y-x²)-y(y-x²)-x³y(y-x²)-(y-x²)-xy²(y-x²)+x²y]/[x²(y-x²)]=
=[x³y-x^5-y²+x²y-x³y²+x^5y-y+x²-xy³+x³y²+x²y]/[x²(y-x²)]=
=[x^5y-x^5+2x²y+x²-xy³-y]/[x²(y-x²)]