How do you find -16t2 plus 60t-560?

To find the expression (-16t^2 + 60t - 560), you would typically evaluate it for a specific value of (t). If you are looking to simplify or factor the expression, you can first factor out the common factor, which is (-4), leading to (-4(4t^2 - 15t + 140)). For further analysis, you could use methods like completing the square or applying the quadratic formula if you want to find the roots of the equation.