0,9*|a+3|-[tex] \frac{17}{5} [/tex]|a+b|-9
0,9*|-4+3|-[tex] \frac{17}{5} [/tex]*|-4+5|-9
0,9*1-[tex] \frac{17}{5} [/tex]-9
[tex] \frac{9}{10} [/tex]-[tex] \frac{17}{5} [/tex]-9
aducem la acelasi numitor
[tex] \frac{9}{10} - \frac{34}{10}- \frac{90}{10} = \frac{-115}{10} [tex] \frac{-115}{10} [/tex]
