15. Solve each equation after factoring fully. a. 3x3-9x2-54x = 0 b. 16x2360 c. z +3z2-25z - 75 = 0 3x(x-3x-18)=0 (x+6) (x+3) 3x=0 X75=10 ta 76 7 Chapter 8: x+3=0 6 (X=-3 3-37 -1(17-120 16. Identify characteristics of the quadratic function and its graph. a. Ay A b. Vertex: AoS: Vertex: AoS: Domain: Range: Increasing: Decreasing: Domain: Range: Increasing: 17. Find (a) the axis of symmetry and (b) the wares of the graph of the function. a. f(x) = 2x-4x+1 Vertex: AoS: Decreasing: 18.Tell whether the function has a minimum value or a maximum value. Then find the value. a. f(x)=5x+10x - 3 Circle one: min or max b.-x + 2x + 16 Circle one: min or max Value: Value: