Help with math please and thank you

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

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