Question

решите систему уравнений
2x^2-5x=y
2x-5=y

Answer 1

{ 2x^2 - 5x = y
{ 2x - 5 = y
Приравниваем левые части
y = 2x^2 - 5x = 2x - 5
2x^2 - 7x + 5 = 0
(x - 1)(2x - 5) = 0
x1 = 1; y1 = 2x - 5 = 2 - 5 = -3
x2 = 5/2; y2 = 2*5/2 - 5 = 0