文档介绍：6X²-7X+1=0
6X²-7X=-1
X²-﹙7/6﹚X+﹙7/12﹚²=-1/6﹢﹙7/12﹚²
﹙ X-7/12﹚²=25/144
∴X-7/12=±5/12
∴X1=1,X2=1/6
5X²-18=9X
5X²-9X=18
X²-=
﹙ X-﹚²=
∴X-.9=±
∴X1=3,X2=-
4X²-3X=52
解:X²-﹙3/4﹚X=13
﹙ X-3/8﹚²=13
∴X-3/8=±29/8 
∴X1=4,X2 =-13/4
5X²=4-2X
5X²+2X=4
X²+=
﹙X+﹚² =
X+=±
X1=-1,X2= 就这么几道,最好去百度搜索,那多 1)x^2-9x+8=0 答案:x1=8 x2=1 
(2)x^2+6x-27=0 答案:x1=3 x2=-9 
(3)x^2-2x-80=0 答案:x1=-8 x2=10 
(4)x^2+10x-200=0 答案:x1=-20 x2=10 
(5)x^2-20x+96=0 答案:x1=12 x2=8 
(6)x^2+23x+76=0 答案:x1=-19 x2=-4 
(7)x^2-25x+154=0 答案:x1=14 x2=11 
(8)x^2-12x-108=0 答案:x1=-6 x2=18 
(9)x^2+4x-252=0 答案:x1=14 x2=-18 
(10)x^2-11x-102=0 答案:x1=17 x2=-6 
(11)x^2+15x-54=0 答案:x1=-18 x2=3 
(12)x^2+11x+18=0 答案:x1=-2 x2=-9 
(13)x^2-9x+20=0 答案:x1=4 x2=5 
(14)x^2+19x+90=0 答案:x1=-10 x2=-9 
(15)x^2-25x+156=0 答案:x1=13 x2=12 
(16)x^2-22x+57=0 答案:x1=3 x2=19 
(17)x^2-5x-176=0 答案:x1=16 x2=-11 
(18)x^2-26x+133=0 答案:x1=7 x2=19 
(19)x^2+10x-11=0 答案:x1=-11 x2=1 
(20)x^2-3x-304=0 答案:x1=-16 x2=19 
(21)x^2+13x-140=0 答案:x1=7 x2=-20 
(22)x^2+13x-48=0 答案:x1=3 x2=-16 
(23)x^2+5x-176=0 答案:x1=-16 x2=11 
(24)x^2+28x+171=0 答案:x1=-9 x2=-19 
(25)x^2+14x+45=0 答案:x1=-9 x2=-5 
(26)x^2-9x-136=0 答案:x1=-8 x2=17 
(27)x^2-15x-76=0 答案:x1=19 x2=-4 
(28)x^2+23x+126=0 答案:x1=-9 x2=-14 
(29)x^2+9x-70=0 答案:x1=-14 x2=5 
(30)x^2-1x-56=0 答案:x1=8 x2=-7 
(31)x^2+7x-60=0 答案:x1=5 x2=-12 
(32)x^2+10