Hi Re: Standard form ax^2 + bx + c = 0, discriminant is b^2 - 4ac discriminant of the equation 5x^2-3x=8 5x^2-3x- 8 = 0 |in standard form b^2 - 4ac 3^2 - 4*(-40) = 9 + 160 = 169 Note: quadratic formula for solving this equation: x = 1.6 x = -1