Question

1. решите уравнение 3x^2+5x=2

Answer 1

3х²+5х=23х²+5х-2=0D=5²-4*3*(-2)=25+24=49
$x_{1}= frac{-5+ sqrt{49} }{2*3} = frac{-5+7}{6} = frac{2}{6}= frac{1}{3} \x_{2}= frac{-5- sqrt{49} }{2*3} = frac{-5-7}{6} = frac{-12}{6}= -2$