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    Daily ChallengeHardAlgebra

    What is the sum of the roots of x2−7x+12=0x^{2} - 7x + 12 = 0?

    Qual é a soma das raízes de x2−7x+12=0x^{2} - 7x + 12 = 0?

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    Solution

    By Vieta's formulas, sum of roots =−(−7)1=7= \frac{-(-7)}{1} = 7. Or: (x−3)(x−4)=0(x-3)(x-4)=0, roots 3+4=73+4=7.