解一元二次方程海量练习题

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1、WORD1)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 (

2、20)x2-3x-304=0 (21)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)x

3、2-29x+208=0 (40)x2+19x-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=0 (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

4、(58)x2-7x+6=0 (59)x2+4x-221=0 (60)x2+6x-91=0 1 x2-6x+5=02 2.x2+4x-5=03 3.4x2-12x+5=04 x2+4x+4=05 2x2-5x+2=06 x2+6x-7=07 x2+3x-4=08 x2+5x-6=09 a2-5a+6=010 c2+3c-4=011 2x2+5x-3=012 x2-6x+8=013 x2-4x-5=014 x2-8x+15=015 7x2-8x+1=016 4x2-4x-3=017 x2-6x+8=018 x2-2x-8=019 x2+2x-8=020 4x2-12x-7=03x-1=0 X+12

5、X+36=24X-4X+1=8 4(6X-7)-9=0X+X-1=0 X+1/6X-1/3=03x-5x=2 x+8x=9 x+12x-15=0x-9x+8=0 x+6x-27=0 x-2x-80=0x+10x-200=0x-20x+96=0 x+23x+76=0 x-25x+154=0x-12x-108=0 x+4x-252=0 x-11x-102=0 x+15x-54=0 x+11x+18=0 x-9x+20=0 x+19x+90=0 x-25x+156=0 x-22x+57=0 x-5x-176=0 x-26x+133=0 x+10x-11=0 x-3x-304=0 x+13x-140=

6、0 x+13x-48=0 x+5x-176=0x+28x+171=0 x+14x+45=0 x-9x-136=0 x-15x-76=0 x+23x+126=0 x+9x-70=0 x-1x-56=0 x+7x-60=0 x+10x-39=0 x+19x+34=0 x-6x-160=0 x-6x-55=0 x-7x-144=0 x+20x+51=0 x-9x+14=0 x-29x+208=0 x+19x-20=0 x-13x-48=0 x+10x+24=0 x+28x+180=0x-8x-209=0 x+23x+90=0 x+7x+6=0 x+16x+28=0 x+5x-50=0 x-23x+1

7、02=0 x+5x-176=0 x-8x-20=0 x-16x+39=0 x+32x+240=0 x+34x+288=0 x+22x+105=0 x+19x-20=0 x-7x+6=0 x+4x-221=0 x+6x-91=0 x+8x+12=0 x+7x-120=0 x-18x+17=0 x+7x-170=0 x+6x+8=0 x+13x+12=0 x+24x+119=0 x+11x-42=0 x+2x-289=0 x+13x+30=0 x-24x+140=0 x+4x-60=0 x+27x+170=0 x+27x+152=0 x-2x-99=0 x+12x+11=0 x+20x+19=0

8、x-2x-168=0 x-13x+30=0 x-10x-119=0 专业资料. 1.方程x2=16的根是x1=_,x2=_.2.若x2=225，则x1=_,x2=_.3.若x22x=0，则x1=_,x2=_.4.若(x2)2=0，则x1=_,x2=_.5.若9x225=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2x27=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(a0)的解的情况是：当ac0时_；当ac=0时_；当ac0时_.二、选择题1.方程5x2+75=0的