Răspunsuri

2014-11-10T09:19:50+02:00
(-1 supra 8-1)•4 supra 9=-9 supra 8• 4 supra 9=1 supra 2
2014-11-10T09:20:27+02:00
=  ( -1/8 - 1/1 ) x 4/9
= ( -1/8 - 8/8 ) x4/9
= -9/8 x 4/9
= - 1/2