Răspuns :

1) a=9,12 a=-2.4 a=-7.3 a=-3.7 a=4.9 a=-4.9 a=-3

-a=-9.12 -a=2.4 -a=-7.3 -a=3.7 -a=3.9 -a=4.9 -a=3

|a|=9.12 |a|=2.4 |a|=7.3 |a|=3.7 |a|=4.9 |a|=-4.9 |a|=3