Răspunsuri

2014-10-17T19:51:37+03:00
A) 4x-2=5. 4x=5+2 x==7/4 B)(x+2)=xpatr.-1. xpatrat +2x +4= xpatrat -1. xpatrat-xpatrat+2x=-1-4 2x=-5 x=-5/2 C). xpatrat-5=0 xpatrat=-5 x=√5