Find the x-intercepts and y-intercept of the following function (x−5)(x−3)(4x+8)

Can someone explain the elimination method to me for this problem?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2