Question

Giải phương trình:

( x - 2 ) ² = 25

Answer 1

( x - 2 )² = 25

=> ( x - 2 )² = 5²

=> x - 2 = 5

=> x = 5 + 2

=> x = 7

Answer 2

Ta có: \(\left(x+2\right)^2=25\) 

        =>    \(\left(x+2\right)^2=5^2\)

        \(=>x+2=5\)

         \(=>x=5-2=3\)

Vậy x=3

Answer 3

Ta có:

\(\left(x-2\right)^2=25\)

\(\left(x-2\right)^2=5^2\)

\(\Rightarrow x-2=5\)

\(x=5+2\)

\(x=7\)

 

Answer 4

( x - 2 )² = 25

<=> ( x - 2 )² = 5²

<=> x - 2 = 5

<=> x = 7