Rezolvati ecuațiile a) -3 (2-x)+8=-(1-x)(x+1)-(x+2)^2
b) x+3 (2-x)^2-4 (x-3)^2=(2x-5)^2-5(x-4)^2+10
c)8\/(adică radical)2x-3 (5\/2x-4)+7\/2=2 (6x-4\/2)+2\/2 (x+3\/2)