十字相乘法练习题 (1).2x2-5x-12=0 (2).3x2-5x-2=0 (3).6x2-13x+5=0 (4).7x2-19x-6=0 (5).12x2-13x+3=0 (6).4x2+24x+27=0 (7).5x²+6x-8=0 (8).2x2+3x+1=0 (9).2y2+y-6=0 (10).6x2-13x+6=0 (11).3a2-7a-6=0 (12).4n2+4n-15=0 (13).6a2+a-35=0 (14)..x2+2x-8 =0 (15).x2+3x-10=0 (16)5x2-8x-13=0 (17)4x2+15x+9=0 (18)15x2+x-2=0 (19)6y2+19y+10=0 (20)20-9y-20y2=0 (21).x2-x-20=0 (22).x2+x-6=0 1 / 2 (31).2x2+5x-3=0 (32).6x2+4x-2=0 (33).x2-2x-3 =0 (34).x2+6x+8 =0 (35).x2-x-12=0 (36).x2-7x+10 =0 (37).6x2+x+2=0 (38).4x2+4x-3=0 (39).x2-6x-7=0 (40).x2+6x-7=0 (41).x2-8x+7=0 (42).x2+8x+7=0 (43).x2-5x+6=0 (44).x2-5x-6=0 (45).x2+5x-6=0 (46).x2+5x+6=0 (47).m²+4m-12=0 (48).6x²-5x-25=0 2 / 2 本文来源:https://www.wddqw.com/doc/a8a5c51dedfdc8d376eeaeaad1f34693daef10f9.html