Réponse :
Bonsoir,
Explications étape par étape
[tex]\left\{\begin{array}{ccc}x^2-10x+y^2&=&0\\\\x^2-22.5x+y^2+125&=&0\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}x^2-10x+y^2&=&0\\\\10x-22.5x+125&=&0\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}x^2-10x+y^2&=&0\\\\12.5x&=&125\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}x&=&10\\\\y&=&0\\\end{array}\right.\\\\\\[/tex]
