which equation can be used to caculate the area of the shaded traingle below? 2(10+6)=32 1/2(10+6)=8 1/2(10x6)=30 2(10x6=120 Plz answer for school

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