Question

(х+5)²+(у-6)²=
дам 40 балів

Answer 1

(х+5)²+(у-6)²= х²+25+у²-36=-11 х² у²

Answer 2

(x+5)^2+(y-6)^2=x^2+10x+25+y^2-12y+36=x^2+y^2+10x-12y+51