Question

um numero + seu inverso =5/2

Answer 1

$x+ \frac{1}{x} = \frac{5}{2} \\ \\ \frac{1}{x} = \frac{5}{2} -x \\ \\ 1=x( \frac{5}{2}-x) \\ \\ \frac{5-2x}{2} =1 \\ \\ 5-2x=2 \\ \\ 5-2=2x \\ \\ x= \frac{3}{2}$

Answer 2

x+1/x=5/2 2x.x+2=5x 2x.x-5x+2=0 -b/4ac=5/4.2.2=5/16 x=25 +/- √5/16/4