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Grouping all terms to the left side of the equation
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$z^2-30-13z=0$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation z^2-30=13z. Grouping all terms to the left side of the equation. Factor the trinomial z^2-30-13z finding two numbers that multiply to form -30 and added form -13. Thus. Break the equation in 2 factors and set each equal to zero, to obtain.