1)x^2-9x+8=0(2)x^2+6x-27=0(3)x^2-2x-80=0(4)x^2+10x-200=0(5)x^2-20x+96=0(6)x^2+23x+76=0(7)x^2-25x+154=0(8)x^2-12x-108=0(9)x^2+4x-252=0(10)x^2-11x-102=0(11)x^2+15x-54=0(12)x^2+11x+18=0(13)x^2-9x+20=0(14)x^2+19x+90=0(15)x^2-25x+156=0(16)x^2-22x+57=0(17)x^2-5x-176=0(18)x^2-26x+133=0(19)x^2+10x-11=0(20)x^2-3x-304=0(21)x^2+13x-140=0(22)x^2+13x-48=0(23)x^2+5x-176=0(24)x^2+28x+171=0(25)x^2+14x+45=0(26)x^2-9x-136=0(27)x^2-15x-76=0(28)x^2+23x+126=0(29)x^2+9x-70=0(30)x^2-1x-56=0(31)x^2+7x-60=0(32)x^2+10x-39=0(33)x^2+19x+34=0(34)x^2-6x-160=0(35)x^2-6x-55=0(36)x^2-7x-144=0(37)x^2+20x+51=0(38)x^2-9x+14=0(39)x^2-29x+208=0(40)x^2+19x-20=0(41)x^2-13x-48=0(42)x^2+10x+24=0(43)x^2+28x+180=0(44)x^2-8x-209=0(45)x^2+23x+90=0(46)x^2+7x+6=0(47)x^2+16x+28=0(48)x^2+5x-50=0(49)x^2+13x-14=0(50)x^2-23x+102=0(51)x^2+5x-176=0(52)x^2-8x-20=0---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---(53)x^2-16x+39=0(54)x^2+32x+240=0(55)x^2+34x+288=0(56)x^2+22x+105=0(57)x^2+19x-20=0(58)x^2-7x+6=0(59)x^2+4x-221=0(60)x^2+6x-91=01x^2-6x+5=022.x^2+4x-5=033.4x^2-12x+5=04x^2+4x+4=052x^2-5x+2=06x^2+6x-7=07x^2+3x-4=08x^2+5x-6=09a^2-5a+6=010c^2+3c-4=0112x^2+5x-3=012x^2-6x+8=013x^2-4x-5=014x^2-8x+15=0157x^2-8x+1=0164x^2-4x-3=017x^2-6x+8=018x^2-2x-8=019x^2+2x-8=0204x^2-12x-7=03x²-1=0X²+12X+36=24X²-4X+1=84(6X-7)²-9=0X²+X-1=0X²+1/6X-1/3=03x²-5x=2x²+8x=9x²+12x-15=0x²-9x+8=0x²+6x-27=0x²-2x-80=0x²+10x-200=0x²-20x+96=0x²+23x+76=0x²-25x+154=0x²-12x-108=0x²+4x-252=0x²-11x-102=0x²+15x-54=0x²+11x+18=0x²-9x+20=0x²+19x+90=0x²-25x+156=0x²-22x+57=0---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---x²-5x-176=0x²-26x+133=0x²+10x-11=0x²-3x-304=0x²+13x-140=0x²+13x-48=0x²+5x-176=0x²+28x+171=0x²+14x+45=0x²-9x-136=0x²-15x-76=0x²+23x+126=0x²+9x-70=0x²-1x-56=0x²+7x-60=0x²+10x-39=0x²+19x+34=0x²-6x-160=0x²-6x-55=0x²-7x-144=0x²+20x+51=0x²-9x+14=0x²-29x+208=0x²+19x-20=0x²-13x-48=0x²+10x+24=0x²+28x+180=0x²-8x-209=0x²+23x+90=0x²+7x+6=0x²+16x+28=0x²+5x-50=0x²-23x+102=0x²+5x-176=0x²-8x-20=0x²-16x+39=0x²+32x+240=0x²+34x+288=0x²+22x+105=0x²+19x-20=0x²-7x+6=0x²+4x-221=0x²+6x-91=0x²+8x+12=0x²+7x-120=0x²-18x+17=0x²+7x-170=0x²+6x+8=0x²+13x+12=0x²+24x+119=0x²+11x-42=0x²+2x-289=0x²+13x+30=0x²-24x+140=0x²+4x-60=0x²+27x+170=0x²+27x+152=0x²-2x-99=0x²+12x+11=0x²+20x+19=0---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---x²-2x-168=0x²-13x+30=0x²-10x-119=01.方程x2=16的根是x1=______,x2=_______.2.若x2=225，则x1=_____,x2=_______.3.若x2－2x=0，则x1=________,x2=________.4.若(x－2)2=0，则x1=________,x2=_______.5.若9x2－25=0，则x1=________,x2=_______.6.若－2x2+8=0，则x1=________,x2=________.7.若x2+4=0，则此方程解的情况是________.8.若2x2－7=0，则此方程的解的情况是_______.9.若5x2=0，则方程解为__________.10.由7，9两题总结方程ax2+c=0(a≠0)的解的情况是：当ac＞0时_________；当ac=0时______________；当ac＜0时__________________.二、选择题1.方程5x2+75=0的根是（）A.5B.－5C.±5D.无实根2.方程3x2－1=0的解是（）A.x=±B.x=±3C.x=±D.x=±3.方程4x2－0.3=0的解是（）A.B.C.D.4.方程=0的解是（）A.x=B.x=±C.x=±D、x=±5.已知方程ax2+c=0(a≠0)有实数根，则a与c的关系是（）A.c=0B.c=0或a、c异号C.c=0或a、c同号D.c是a的整数倍6.关于x的方程(x+m)2=n,下列说法正确的是A.有两个解x=±B.当n≥0时，有两个解x=±－mC.当n≥0时，有两个解x=±D.当n≤0时，方程无实根7.方...