In Problems a-c, use the Bisection Method to approximate the real root of the given equation on the given interval. Each answer should be accurate to two decimal places.
a. x3 + 2x - 6 = 0; [1, 2]
b. x4 + 5x3 + 1 = 0; [-1, 0]
c. 2 cos x - sin x = 0; [1, 2]