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If f(x),g(x) and h(x) are three polynomi...

If `f(x),g(x)` and `h(x)` are three polynomials of degree 2, then prove that `phi(x)` =`|[f(x),g(x),h(x)],[f ^ (prime)(x),g^(prime)(x),h^(prime)(x)],[f^(primeprime)(x),g^(primeprime)(x),h^(primeprime)(x)]|` is a constant polynomial.

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