(1) a2-7a+6=0;(2)8x2+6x-35=0;
(3)18x2-21x+5=0;(4) 20-9y-20y2=0;
(5)2x2+3x+1=0;(6)2y2+y-6=0;
(7)6x2-13x+6=0; (8)3a2-7a-6=0;
(9)6x2-11x+3=0; (10)4m2+8m+3=0;
(11)10x2-21x+2=0;(12)8m2-22m+15=0;
(13)4n2+4n-15=0; (14)6a2+a-35=0;
(15)5x2-8x-13=0; (16)4x2+15x+9=0;
(17)15x2+x-2=0; (18)6y2+19y+10=0;
(19) 2(a+b) 2+(a+b)(a-b)-6(a-b) 2=0; (20)7(x-1) 2+4(x-1)-20=0
222(1)x?7x?6 (2)x?13x?36(3)x?5x?24
22x?2x?15?x?2x?3 (4) (5)
22222x?xy?16y(x?x)?8(x?x)?12 (6)(7)
2225x?6xy?8y12x?5x?2(1) (2)
(3)6x2?7x?3
(5)5a2b2?23ab?10
(7)(a2?8a)2?22(a2?8a)?120
(9)4m2?8mn?3n2
7
10?(4
7?1
2)?7
25 [1-(1314?8)]÷4
1
7?753
8?7?8
(4)8x2?26xy?15y26)3a2b2?17abxy?10x2y2 8)(x2?2x?3)(x2?2x?24)?90 (10)6y2?11y?10 (916?935118)?8 2?8?8?4 ( (
53115175953×[1÷( )] [ -( - )]× + × + 843614397898
1346362?2
3?× ÷4 5 -( ÷ + ) ????477714135?54?
?x?2?3y?3x?y?5?2x?3y?5(1)? ⑵?⑶?2x?3y5x?3y?13?04x?y?3???
(1)(x?1)2?9;(2)(2x?1)2?3;
(3)(6x?1)2?25?0.(4)81(x?2)2?16.
1).x2?x?1?0 2
(1)3(x?1)2?12;
(3)x2?8x?84;
(1)x2=4
(5)(x+1)2=0
(9)1
2 (2x+1)2=3
(1)x2+4x-4=0
(5)x2-2
3x-1=0.
).3x2?6x?1?0 3).(x?1)2?2(x?1)?12?0 (2)y2?4y?1?0;(4)y2?3y?1?0. (2)x2=16 (3)2x2=32 (4)2x2=82. (6)2(x-1)2=0(7)(2x+1)2=0 (8)(2x-1)2=1 10) (x+1)2-144=0 (2)x2-4x-4=0 (3)x2-3x+2=0 (4)x2+3x-10=0 (6)x(x+4)=12(7)x2-4(x-2)=5 (8)y(y+3)=28 (
1、 6x2=x 2、2x2-3x=0 3、4x(3+x)=7(3+x) 4、x(3-x)=3(x-3)
25、4x2-12x-9=0 6、y-44222y+=0 7、(2x-1)=9x28、(x-3)=25(x+4) 9、
(x-3)2=x2-9
1)x2-9x+8=0
(5)x2-20x+96=0
(9)x2+4x-252=0
(13)x2-9x+20=0
(17)x2-5x-176=0
(21)x2+13x-140=0
(25)x2+14x+45=0
(29)x2+9x-70=0
(33)x2+19x+34=0 39(2)x2+6x-27=0 (6)x2+23x+76=0 (10)x2-11x-102=0 (14)x2+19x+90=0 (18)x2-26x+133=0 (22)x2+13x-48=0 (26)x2-9x-136=0 (30)x2-1x-56=0 (34)x2-6x-160=0 (3)x2-2x-80=0 (7)x2-25x+154=0 (11)x2+15x-54=0 (15)x2-25x+156=0 (19)x2+10x-11=0 (23)x2+5x-176=0 (27)x2-15x-76=0 (31)x2+7x-60=0 (35)x2-6x-55=0 (4)x2+10x-200=0 (8)x2-12x-108=0 2+11x+18=0 (16)x2-22x+57=0 (20)x2-3x-304=0 (24)x2+28x+171=0 (28)x2+23x+126=0 (32)x2+10x-39=0 (36)x2-7x-144=0 (12)x
(37)x2+20x+51=0 (38)x2-9x+14=0 (39)x2-29x+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 (58)x2-7x+6=0 (59)x2+4x-221=0 (60)x2+6x-91=0
3x2-1=0 X2+12X+36=24 X2-4X+1=84(6X-7)2-9=0X2+X-1=0
X2+1/6X-1/3=0 3x2-5x=2x2+8x=9 x2+12x-15=0 x2-9x+8=0
x2+6x-27=0 x2-2x-80=0 x2+10x-200=0 x2-20x+96=0 x2+23x+76=0
x2-25x+154=0 x2-12x-108=0 x2+4x-252=0 x2-11x-102=0 x2+15x-54=0
x2+11x+18=0 x2-9x+20=0 x2+19x+90=0 x2-25x+156=0 x2-22x+57=0
x2-5x-176=0 x2-26x+133=0 x2+10x-11=0 x2-3x-304=0 x2+13x-140=0
x2+13x-48=0 x2+5x-176=0 x2+28x+171=0 x2+14x+45=0 x2-9x-136=0
x2-15x-76=0
x2+10x-39=0
x2+20x+51=0
x2+10x+24=0
x2+16x+28=0
x2-8x-20=0
x2-16x+39=0
x2+19x-20=0
x2-7x+6=0
x2+23x+126=0 x2+9x-70=0 x2-1x-56=0 x2+7x-60=0 x2+19x+34=0 x2-6x-160=0 x2-6x-55=0 x2-7x-144=0 x2-9x+14=0 x2-29x+208=0 x2+19x-20=0 x2-13x-48=0 x2+28x+180=0 x2-8x-209=0 x2+23x+90=0 x2+7x+6=0x2+5x-50=0x2-23x+102=0x2+5x-176=0 x2+32x+240=0x2+34x+288=0x2+22x+105=0 x2+4x-221=0x2+6x-91=0x2+8x+12=0x2+7x-120=0
x2-18x+17=0 x2+7x-170=0x2+6x+8=0x2+13x+12=0x2+24x+119=0
x2+11x-42=0x2+2x-289=0x2+13x+30=0x2-24x+140=0x2+4x-60=0
x2+27x+170=0
x2+20x+19=0
x2+27x+152=0 x2-2x-99=0 x2+12x+11=0
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