x²-5x-2=0
X=[5±√(25+8)]/2=(5±√33)/2
9(2x+3)²-4(2x-5)²=0
[3(2X+3)+2(2X-5)][3(2X+3)-2(2X-5)]=0
(6X+9+4X-10)(6X+9-4X+10)=0
(13X-1)(2X+19)=0
X1=1/13,X2=-19/2
(6x²-7x)²-2(6x²-7x)=3
(6X²-7X)²-2(6X²-7X)-3=0
[(6X²-7X)-3][(6X²-7X)+1]=0
(6X²-7X-3)(6X²-7X+1)=0
(3X+1)(2X-3)(6X-1)(X-1)=0
X1=-1/3,X2=3/2,X3=1/6,X4=1