Плиз помогиииииииииииииииите!!!!!!
x^2 -1 = 5-x
x^2 +x -6 = 0
x = 2 x =-3
3*(2x^2+x)= 5(4x-3)
6x^2 +3x -20x +15=0
6x^2 -17x +15=0