Question

form a polynomial f(x) with real coefficients having the degree 4 zeros 2-3i and -1 with a multiplicity of 2

Answer 1

Well, do it...

zero of -1 means factor of (x+1)
Multiplicity 2 means (x+1)^2
With Real Coefficients, complex zeros come in conjugate pairs, or 2-3i also mean s2+3i

That's about it.