Question

(x-1)²=25

Answer 1

(x - 1)² = 25

=> x - 1 = 5 => x = 6

hoặc x - 1 = -5 => x = -4

Vậy x = 6, x = -4

Answer 2

=>(x-1)²=5²=(-5)²

TH1:x-1=5

=>x=5+1

=>x=6

TH2:x-1=-5

=>x=-5+1

=>x=-4

Vậy x thuộc {6;-4}

Answer 3

=> x-1 =5

=>x=5+1

=>x=6

KL: vậy x=6

Answer 4

=>(x-1)²=5²
=>x-1=5
=>x=6
..................................................................................................................................................................

Answer 5

(x-1)^2=25

(x-1)^2=5^2

suy ra:x-1=5

             x    =5+1

              x     =6