一元二次方程百题 一、用直接开平方法解下列一元二次方程
(1)0142x (2)2)3(2 x (3)512 x (4)1 628 12 x (5)22 2 5x ; (6)2(1 )9x; (7)2(61 )2 50x. (8)28 1 (2 )1 6x. (9)25 (21 )1 8 0y (10)21 (31 )6 44x (11)26 (2 )1x; (12)25 (21 )1 8 0y (13)21 (31 )6 44x (14) 26 (2 )1x; (15) 2()(00 )axcb ba,≥ 二、用配方法解下列一元二次方程
(16)0662yy (17) xx4232 (18)9 642 xx
(19) 210xx (20)23610xx (21)21(1 )2 (1 )02xx (22)22540xx (23)210xx (24)23920xx. (25)2310yy . (26).210xx (27).23610xx (28).21(1 )2 (1 )02xx (29)23610xx (30) 22540xx (31)210xx (32)23920xx. (33)0542 xx
(34)01322 xx (35)07232 xx (36)01842xx (37)0222nmxx (38)00222mmmxx 三、用公式解法解下列方程
(39)0822 xx (40)22314yy (41)yy32132 (42)x2+4x+2=0 ; (43)3x2-6x+1=0; (44)4x2