配方法练习题
(1)x2+4x-4=0 (2)x2-4x-4=0 (3)x23x20 (4)x23x100
(5)x2
2x24(x2)5 (8)y(y3)28 x(x4)12 (7)x10. (6)
31111(9)x2x0(10)y222y40 (11)x2x3663
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0
(12)y223y10 (13)4x2+4x-1=0 (14)2x2-4x-1=0
1(15)x23x20 (16)2x22
!
22x2+x1033x60 (17).
2222x(x4)12x4(x2)5y(y-3)2353 (18) (19) (20)
(21)
12x42x10 (22)
32y32y10 (23)42(x-3)(4x-3)90