Question

Answer 1

`2(x+4)+5=65`

`=>2(x+4)=65-5`

`=>2(x+4)=60`

`=>x+4=60:2`

`=>x+4= 30`

`=>x=30-4`

`=>x=26`

`----------`

`(x-5)^2=16`

`=>(x-5)^2=4^2`

\(\Rightarrow\left[{}\begin{matrix}x-5=4\\x-5=-4\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=9\\x=1\end{matrix}\right.\)

Answer 2

\(a)2(x+4)+5=65\)

\(<=>2(x+4)=65-5=60\)

\(<=>(x+4)=60:2=30\)

\(<=>x=30-4=26\)

\(b)(x-5)^2=16\)

\(<=>x-5=4<=>[x=9\)

\(<=>x-5=-4<=>[x=1\)