(x-2)(x+1)=3x-4solve
x^2 + x - 2x - 2 = 3x - 4 x^2 - x - 2 = 3x - 4 x^2 - x - 3x - 2 + 4 = 0x^2 - 4x + 2 = 0 ; is the quadratic formula ;a = 1 ; b = -4 ; c = + 2 ;The solutions are ( - 1 + \(2 \sqrt{3}\)) / 2 and ( - 1 - \(2 \sqrt{3}\)) / 2 ;
