11+5.(x-1)^2=56 mn giúp mik nhé

2 câu trả lời

`Answer:`

`11+5.(x-1)^2=56`

`=>5.(x-1)^2=56-11`

`=>5.(x-1)^2=45`

`=>(x-1)^2=45:5`

`=>(x-1)^2=9`

`=>`\(\left[ \begin{array}{l}x-1=-3\\x-1=3\end{array} \right.\) 

`=>`\(\left[ \begin{array}{l}x=-2\\x=4\end{array} \right.\) 

Vậy \(\left[ \begin{array}{l}x=-2\\x=4\end{array} \right.\) 

`#Boy`

`11+5.(x-1)^2=56`

`->5.(x-1)^2=56-11`

`->5.(x-1)^2=45`

`->(x-1)^2=45:5`

`->(x-1)^2=9`

`->(x-1)^2=3^2`

`->x-1=+-3`

`->[(x-1=3),(x-1=-3):}`

`->[(x=3+1),(x=(-3)+1):}`

`->[(x=4),(x=-2):}`

Vậy `x=4;x=-2`