Question

Найдите корень уравнения x = −x+54x+2

Answer 1

2x - 54/x - 2 = 0  / x≠ 0
2x^2 - 2x  -  54 = 0  / 2
x^2 - x - 27 = 0
D = 1 + 4*1*27 = 109
x1 = (1 - √109)/2
x2 = (1 + √109)/ 2