求x的值(2x+1)^2=16 36(x-1)^2=49

问题描述:

求x的值(2x+1)^2=16 36(x-1)^2=49

求x的值(2x+1)^2=16
2x+1=±4.
2x+1=4.
2x=3.
x=3/2.
2x+1=-4.x=-5/2.
36(x-1)^2=49。
x-1=±7/6
x=±7/6+1.
x1=13/6.
x2=-1/6.


(2x+1)²=16
开方得:
2x+1=4或2x+1=-4
2x=3或2x=-5
x=3/2或x=-5/2
36(x-1)²=49
(x-1)²=49/36
开方得:
x-1=7/6或x-1=-7/6
x=13/6或x=-1/6