A triangle has two sides of length 3 and 15. What is the smallest possible whole-number length for the third side?

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

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Ineed with this problem 21 show steps