How much material is left as a fraction

In which form is the following function written? y = - 2(x – 3)(x + 5)

Write the percent as a fraction or mixed number in simplest form. 0.8%

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0