# Roots of Quadratic

Algebra Level pending

Consider real numbers $$m$$ and $$n$$ such that $$-1+2i$$ is a root of the quadratic equation $$x^2+mx+n=0$$. If $$m$$ and $$n$$ are the two roots of the quadratic equation $$x^2+Ax+B=0$$, what is the value of $$B-A$$?

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