Question

Решите уравнение .(5-х)^2=3x(5-x)

Answer 1

(5-x)^2=3x(5-x)
25-10x+x^2-15x+3x^2=0
4x^2-25x+25=0
Д=625-4*4*25=625-400=225
x1=25+15/8=5
x2=25-15/8=1.25

Answer 2

5-x=3x
5=3x+x
5=4x
x=5/4