初三数学(用配方法解方程)
展开全部
1、6X^2+X-12=0
X^2+1/6X-2=0
X^2+1/6X+1/144-2-1/144=0
X^2+1/6X+1/144=289/144
(X+1/12)^2=289/144
X+1/12=+_17/12
X=16/12 X=-18/12=-9/7
2, 2X^2+1-3X=0
X^2-3/2X+1/2=0
X^2-3/2X+9/16-9/16+1/2=0
X^2-3/2X+9/16=1/16
(X-3/4)^2=1/16
X-3/4=+_1/4
X=1 X= 1/2
X^2+1/6X-2=0
X^2+1/6X+1/144-2-1/144=0
X^2+1/6X+1/144=289/144
(X+1/12)^2=289/144
X+1/12=+_17/12
X=16/12 X=-18/12=-9/7
2, 2X^2+1-3X=0
X^2-3/2X+1/2=0
X^2-3/2X+9/16-9/16+1/2=0
X^2-3/2X+9/16=1/16
(X-3/4)^2=1/16
X-3/4=+_1/4
X=1 X= 1/2
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询