Ayuda con este problema de ecuaciones de primer grado

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

What describes horizontal cross section of the right rectangle 6m 8m 5m

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!