Răspuns :
(x - 1)²= 4
x-1= +/- 2
x-1= 2
=> x=3
x-1= -2
=> x= -1
S= {-1; 3}
Baftă!
A = {x ∈ℝ|(x - 1)²= 4}
(x-1)²=4
x-1=±√4
x-1=±2
=> x-1=2
x=3
x-1=-2
x=-1
S=3+(-1)=3-1=2
Kawaiimath
(x - 1)²= 4
x-1= +/- 2
x-1= 2
=> x=3
x-1= -2
=> x= -1
S= {-1; 3}
Baftă!
A = {x ∈ℝ|(x - 1)²= 4}
(x-1)²=4
x-1=±√4
x-1=±2
=> x-1=2
x=3
x-1=-2
x=-1
S=3+(-1)=3-1=2
Kawaiimath