Solve the equation 5x 2 - 3x - 4 = 0 and give your answer correct to 3 significant figures.

The given equation is 5x 2 - 3x - 4 = 0. Comparing it with ax 2 + bx + c = 0, we get a = 5 , b = -3 , c = -4 By using formula, we obtain: Hence roots of the given equations are 1.24 , -0.643.