Răspunsuri

2014-10-19T00:08:36+03:00
12xpatrat-15x+4x-5-(12xpatrat+30x-22x-55)=12xpatrat-11x-5-12xpatrat-8x+55=-19x+50 -19x+50=0. -19x=-50. (-1) x=50/19=2,(631)