Question

(5-х)в квадрате - х(2,5+х)=0

Answer 1

(5-х) в квадрате = 25+х^2-10x
25+x^2-10x-x(2.5+x)=0
25+x^2-10x-2.5x-x^2=0
25-12.5x=0
-12.5x=-25
x=2

Answer 2

25-10x+x^2-2,5x-x^2=0
-12,5x=25
x=2