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Move everything to the left hand side of the equation
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$x^2-42-x=0$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation x^2=42+x. Move everything to the left hand side of the equation. Factor the trinomial x^2-42-x finding two numbers that multiply to form -42 and added form -1. Thus. Break the equation in 2 factors and set each equal to zero, to obtain.