Real roots of quadratic equation

Prove that the roots of $(x - a) (x - b) = h^{2}$ are always real.

~5 minProof · checked by AIquadratic equationsdiscriminantreal roots

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. IX. The Theory of Quadratic Equations, Examples IX.a, No. 25

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