Question

(x - 3)^2 = 196

Answer 1

`(x-3)^2=196`

`(x-3)^2 = (14)^2`

`=> x-3=14`

`x=14+3`

`x=17`

`=> x-3=-14`

`x=-14+3`

`x=-11`

Vậy `x={17;-11}`

Answer 2

\(\left(x-3\right)^2=196\)

\(\Rightarrow\left(x-3\right)^2=\left(\pm14\right)^2\)

\(\Rightarrow\left[{}\begin{matrix}x-3=14\\x-3=-14\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=17\\x=-11\end{matrix}\right.\)

 

Answer 3

\(\left(x-3\right)^2=14^2\Leftrightarrow x-3=14\Leftrightarrow x=17\)

\(\left(x-3\right)^2=\left(-14\right)^2\Leftrightarrow x-3=-14\Leftrightarrow x=-11\)

Answer 4

(x - 3)^2 = 196

(x - 3)² = \(\pm\)14²

=> x - 3 = \(\pm\) 14

TH1: x - 3 = 14

         x      = 14 + 3

         x      = 17

TH2: x - 3 = -14

         x      = -14 + 3

         x      = -11

Answer 5

(x - 3)^2= 196

(x - 3)^2= (14)^2

=> TH1: x - 3= 14

x= 14 + 3

x= 17

TH2: x- 3= -14

x= -14 + 3

x= -11

Vậy x thuộc { 17, -11 }