`( x - 2 )^2 + ( x - 3 )( x - 2 ) = 0`
`⇔ ( x - 2 )( x - 2 ) + ( x - 3 )( x - 2 ) = 0`
`⇔ ( x - 2 )( x - 2 + x - 3 ) = 0`
`⇔ ( x - 2 )( 2x - 5 ) = 0`
`<=>`\(\left[ \begin{array}{l}x-2=0\\2x-5=0\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=2\\x=\frac{5}{2} \end{array} \right.\)