解一元二次方程海量练习题

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1、1)x2-9x+8=0(2)x2+6x-27=0(3)x2-2x-80=0(4)x2+10x-200=0(5)x2-20x+96=0(6)x2+23x+76=0(7)x2-25x+154=0(8)x2-12x-108=0(9)x2+4x-252=0(10)x2-11x-102=0(11)x2+15x-54=0(12)x2+11x+18=0(13)x2-9x+20=0(14)x2+19x+90=0(15)x2-25x+156=0(16)x2-22x+57=0(17)x2-5x-176=0(18)x2-26x+133=0(19)x2+10x-11=0(20)x2-3x-304=0(2

2、1)x2+13x-140=0(22)x2+13x-48=0(23)x2+5x-176=0(24)x2+28x+171=0(25)x2+14x+45=0(26)x2-9x-136=0(27)x2-15x-76=0(28)x2+23x+126=0(29)x2+9x-70=0(30)x2-1x-56=0(31)x2+7x-60=0(32)x2+10x-39=0(33)x2+19x+34=0(34)x2-6x-160=0(35)x2-6x-55=0(36)x2-7x-144=0(37)x2+20x+51=0(38)x2-9x+14=0(39)x2-29x+208=0(40)x2+19x-

3、20=0(41)x2-13x-48=0(42)x2+10x+24=0(43)x2+28x+180=0(44)x2-8x-209=0(45)x2+23x+90=0(46)x2+7x+6=0(47)x2+16x+28=0(48)x2+5x-50=08(49)x2+13x-14=0(50)x2-23x+102=0(51)x2+5x-176=0(52)x2-8x-20=0(53)x2-16x+39=0(54)x2+32x+240=0(55)x2+34x+288=0(56)x2+22x+105=0(57)x2+19x-20=0(58)x2-7x+6=0(59)x2+4x-221=0(60)

4、x2+6x-91=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=0x²-5x-176=0x²-26x+13

5、3=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=08x²+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+

6、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+2

7、7x+170=0x²+27x+152=0x²-2x-99=0x²+12x+11=0x²+20x+19=0881.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=