Question 157288
Begin by setting up a quadratic equation equal to zero so:

35. 4m^2 - 20m + 25 = 0
45. x^2 - x = 0

Then, label a, b, and c which are the coefficients:

35. a = 4, b = -20, c = 25
45. a = 1, b = -1, c = 0

Then, use the discriminant formula b^2 - 4ac:

35. (-20)^2 - 4(4)(25) = 0
45. 1^2 - 4(1)(0) = 1