Odp:
[tex]Dziedzina: x^{3} - 7x^{2} \neq 0\\x^{2} (x - 7)\neq 0\\x\neq 0 \ i \ x\neq 7\\\\\frac{x^{2} -14x+49}{x^{3} - 7x^{2} } =0\\\frac{(x-7)^{2} }{x^{3} - 7x^{2} } =0\\ \frac{(x-7)^{2} }{x^{2}(x-7) } =0\\\frac{(x-7) }{x^{2}} =0 /*x^{2} \\(x-7) =0\\\ x-7=0 \\x=7\\\\ax^{2} -bx+c = x^{2} -14x+49 = (x - 7)^{2}[/tex]
Szczegółowe wyjaśnienie: