Let x1x2 be the two roots of equation 2x2 + 4x-1, and find the absolute value of x1-x2

Let x1x2 be the two roots of equation 2x2 + 4x-1, and find the absolute value of x1-x2

X1 + x2 = - 2x1 * x2 = - 1 / 2 / x1-x2 / = under root [(x1 + x2) ^ 2-4x1 * x2] = under root 6