Question

(x−5)2−x(x+5)=−5
решите уравнение

Answer 1

2х-10-х²-5х+5=0
-х²-3х+5=0
D=9-4×5×(-1)=29

$x = frac{3 + sqrt{29} }{ - 2} \ \ x = frac{3 - sqrt{29} }{ - 2}$