Question

(2-x)平方=16 4(x+1)平方-25=0 x平方-2x+1=3

Answer 1

(2-x)平方=16

2-x=±4

x=2±4

x1=6,x2=-2

4(x+1)平方-25=0

(x-1)^2=25/4

x-1=±5/2

x=1±5/2

x1=7/2 x2=-3/2

x平方-2x+1=3

(x-1)^2=3

x-1=±√3

x1=1+√3

x2=1-√3