changed question

Find the absolute value of the difference of the solutions of $x^2-5x+5=0$

The solutions of any quadratic equation are

$x = {-b \pm \sqrt{b^2-4ac} \over 2a}\\x=\frac{-b}{2a}\pm \frac{ \sqrt{b^2-4ac} }{2a}$

So the ablosute value difference of the roots is

$\text{abs value of diff of roots} \\ =\left|\left[ \frac{-b}{2a}+ \frac{ \sqrt{b^2-4ac} }{2a}\right] - \left[ \frac{-b}{2a}- \frac{ \sqrt{b^2-4ac} }{2a}\right] \right|\\ =\left|\left[ \frac{-b}{2a}+ \frac{ \sqrt{b^2-4ac} }{2a}\right] + \left[ \frac{b}{2a}+\frac{ \sqrt{b^2-4ac} }{2a}\right] \right|\\ =\left| \frac{ \sqrt{b^2-4ac} }{2a}+ \frac{ \sqrt{b^2-4ac} }{2a} \right|\\ =\left| \frac{ \sqrt{b^2-4ac} }{a} \right|\\ $

for your question

$x^2-5x+5=0$

a=1    b=-5        c=5

$\text{abs value of diff of roots }= \frac{ \sqrt{25-20}}{1}=\sqrt5$

Ants can be such pains-in-the-ass! Especially at picnics … and on math forums. LOL