(x-5)(x+2)=x(5-x) помогите решить?

Question

(x-5)(x+2)=x(5-x) помогите решить?

Answer 1

X^2 + 2x - 5x - 10 = 5x - x^2
2x^2 - 8x - 10 = 0
D = 64 - 4 * 2 * (-10) = 64 + 80 = 144
x1,2 = (8 +/- 12)/4
x1 = 5; x2 = -1
Ответ: x1 = 5; x2 = -1.