Решите уравнения :) 5x^2-3x-2=0 6x^2+x-2=0 2x^2-5x+3=0 x^2-5x-1=0
1) 5x^2 - 3x - 2 = 0
5x 2
x -1
(5x+2)(x-1)=0
x1=-2/5
x2=1
2) 6x^2 + x - 2 = 0
2x -1
3x 2
(2x-1)(3x+2)=0
x1=1/2
x2=-2/3
3)x^2 - 5x - 1 = 0
x1 = (5 + V25 + 4)/2
x2 = (5 - V29)/2