Question

Решите Квадратное неравенство:4х^+3х-1<0

Answer 1

$4 x^{2} +3x-1 textless 0\ \ 4 x^{2} +3x-1 = 0\ \ a=4;b=3;c=-1;\ \ D = b^{2} - 4ac = 9-4*4*(-1) = 9 + 16 = 25\ \ x_{1} = frac{-3+ sqrt{25}}{2*4}= frac{2}{8} =frac{1}{4} \ \ x_{2} = frac{-3- sqrt{25}}{2*4}= frac{-8}{8} =-1$

Answer 2

Все