Question

найдите сумму корней уравнения 2x^2-5x-3=0

Answer 1

${2x}^{2} - 5x - 3 = 0$

D=${b}^{2} - 4ac = 25 - 4 times times ( - 3) = \ 25 + 24 = 49 = {7}^{2}$

$x1 = frac{ 5 - 7}{4} = frac{ - 2}{4} = - 0.5 \ x2 = frac{5 + 7}{4} = frac{12}{4} = 3$

3+(-0.5)=2.5.

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