Quadratic from Complex Roots

Form the quadratic equation whose roots are $-3 etween 5i$ .

~3 minAnswer checked instantlyQuadratic equationsComplex rootsSum and product of roots

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. IX. The Theory of Quadratic Equations, Examples IX.a, No. 7

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).