Question

$x^{2} +2,5x=0 2 x^{2} -3x=0$

Answer 1

$displaystyle x^2+2.5x=0 x(x+2.5)=0 x=0; x=-2.5$



$displaystyle 2x^2-3x=0 x(2x-3)=0 x=0; x=3/2=1.5$