Question 1057649
Real coefficients means complex roots come in complex conjugate pairs.
{{{f(x)=(1)(x-5)(x-3i)(x+3i)}}}
{{{f(x)=(x-5)(x^2+9)}}}
{{{f(x)=x^3+9x-5x^2-45}}}
{{{f(x)=x^3-5x^2+9x-45}}}