Question

-5x в крадрате +11с-2=0 решите пж

Answer 1

$-5x^2+11x-2=0; |cdot (-1)\\5x^2-11x+2=0\\D=121-40=81\\x_1= frac{11-9}{10} =frac{2}{10}=0,2\\x_2= frac{11+9}{10}=frac{20}{10}=2$