If (x + 8) is a factor of f(x), which of the following must be true?

a) x = –8 and x = 8 are roots of f(x).
b) neither x = –8 nor x = 8 is a root of f(x).
c) f(–8) = 0
d) f(8) = 0

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte