H(x)=-6x+240 domain and range

The graph shows the function f(x) = (2.5)x was horizontally translated left by a value of h to get the function g(x) = (2.5)x–h.

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Find the x-intercepts for the parabola defined by this equation: y=-3x^2-6x+9