a,\(\sqrt{ }\)2x+3 + \(\sqrt{ }\)x+1 = 3x + 2\(\sqrt{ }\)(2x+3)(x+1)

b, \(\sqrt{ }\)3x -2 + \(\sqrt{ }\)x-1 = 4x -9 +2\(\sqrt{ }\)3x²-5x+2

c, \(\sqrt{ }\)x+2\(\sqrt{ }\)x-1 - \(\sqrt{ }\)x-2\(\sqrt{ }\)x-1 =-2

d, \(\sqrt{ }\)x² +12 + 5= 3x + \(\sqrt{ }\)x² +5