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Find the roots of the equation using the Quadratic Formula
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$-x^2+4x+5=0$
Learn how to solve equations problems step by step online. Find the roots of -x^2+4x+5=0. Find the roots of the equation using the Quadratic Formula. Factor the trinomial by -1 for an easier handling. Factor the trinomial -\left(x^2-4x-5\right) finding two numbers that multiply to form -5 and added form -4. Thus.