$$ \begin{aligned}x(2x-5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x^2-5x\end{aligned} $$ | |
① | Multiply $ \color{blue}{x} $ by $ \left( 2x-5\right) $ $$ \color{blue}{x} \cdot \left( 2x-5\right) = 2x^2-5x $$ |