That would be , but it is also equal to just . You would simplify the part, and you would get , or if you need a decimal, But don't forget the negative part, so the answer would be or
The y-intercepts are (0,0) and (5,0) The equation of the quadratic function is f(t) = at(t-5) Solving for a 12 = a(3)(3-5) a = -2 The equation of the quadractic function is f(t) = -2t(t -5) f(t) = -2t² + 10t<span />