经典解法20题
（1）(3x+1)^2=7
（2）9x^2-24x+16=11
(3) (x+3)(x-6)=-8
(4) 2x^2+3x=0
(5) 6x^2+5x-50=0 (选学）
(6)x^2-4x+4=0 （选学）
(7)（x-2）^2=4（2x+3）^2
（8）y^2+2√2y-4=0
（9）（x+1）^2-3（x+1)+2=0
（10）x^2+2ax-3a^2=0（a为常数）
1
(11)2x^2＋7x＝4．
(12)x^2－1＝2 x
（13） x^2 + 6x+5=0
(14) x ^2－4x+ 3=0
(15)7x^2 －4x－3 =0
(16)x ^2－6x+9 =0
(17)x2+8x+16=9
(18)(x2-5)2=16
(19)x(x+2)=x(3-x)+1
(20) 6x^2+x-2=0
2
海量111题
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
3
(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
4
(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 (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=0 (61)x^2+8x+12=0 (62)x^2+7x-120=0 (63)x^2-18x+17=0 (64)x^2+7x-170=0 (65)x^2+6x+8=0
5
一元二次方程练习题 含答案（解法20题 题海111题）
