Question

-5Х² +1,4х + 3,6 = 0

Answer 1

$- 5x {}^{2} + 1.4x + 3.6 = 0 \ \ 5x {}^{2} - 1.4x - 3.6 = 0$

D = ( -1.4 )² - 4 * 5 * ( -3.6 ) = 1.96 + 72 = 73.96

$x1 = frac{1.4 - 8.6}{2 times 5} \ \ x2 = frac{1.4 + 8.6}{2 times 5} \ \ x1 = - 0.72 \ \ x2 = 1$

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