Please just do 1235 and leave the 4

1. For each of the following functions, which are in standard form, find the value of the discriminant to determine the number of zeros. a. f(x) = 5x- - 4x +2 b. f(x) = 9x--14.4x + 5.76 2. Without solving the equation, find the number of roots for the equation -7x2 -+ 56x -112. 3. Without drawing a graph. say whether the graph of each function intersects the x-axis at one point, intersects the x-axis at two points, or does not intersect the x-axis at all. a. f(x) = 16 + 8x +x2 b. f(x) = -2x3+4x - 3 4 The function g(x) = 4 x -4x + m has exactly one zero. What is the value of m? 5. For what values of k does the equation 3 x + 4x + k = 0 have no real roots? One real root? Two real roots