Question

(-5x-3)(2x-1)=0 решите уравнение

Answer 1

-10x^2-6x+5x+3=0
-10x^2-x+3=0
D=b^2-4ac=1-4(-10)*3=121
$x_{1} = frac{-b+ sqrt{121} }{2a} =- frac{6}{10}=-0,6 \ x_{2}= frac{10}{20}=0,5$