4(x+3)눀=(x-1)눀怎么解

2024-12-18 19:07:51
推荐回答(4个)
回答1:

解:4(x+3)^2=(x-1)^2
4x^2+24x+36=x^2-2x+1
4x^2-x^2+24x+2x+36-1=0
3x^2+26x+35=0
(3x+5)(x+7)=0
x=-5/3或x=-7
所以原方程的根为x1=-5/3,x2=-7
方法二:两边同时开根号得:
2(x+3)=±(x-1)
2x+6=x-1或2x+6=1-x
x=-7或x=-5/3

回答2:

2(x+3) = ± (x - 1)
可分成两个式子,
2x + 6 = x - 1,x1 = - 7
2ⅹ + 6 = - x + 1,3x = - 5,x2 = - 5/3
所以,原方程的解为
x1 = - 7
x2 = - 5/3

回答3:

两边同时开方,剩2(x+3)=(x-1)变成x=-7

回答4:

解题如下:
4(x+3)²-(x-1)²=0
(2(x+3)+x-1)(2(x+3)-x+1)=0
(2x+6+x-1)(2x+6-x+1)=0
(3x+5)(x+7)=0
3x+5=0,或x+7=0,得:
x₁=-5/3,x₂=-7