Question
Answer
$$(f-z)^2+y^2-(\dfrac{fm-nz}{m})^2=f^2-2fz+z^2+y^2-(\dfrac{fm-nz}{m})^2$$
Explanation
| $$ \begin{aligned}(f-z)^2+y^2-(\frac{fm-nz}{m})^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}f^2-2fz+z^2+y^2-(\frac{fm-nz}{m})^2\end{aligned} $$ | |
| ① | Find $ \left(f-z\right)^2 $ using formula. $$ (A - B)^2 = \color{blue}{A^2} - 2 \cdot A \cdot B + \color{red}{B^2} $$where $ A = \color{blue}{ f } $ and $ B = \color{red}{ z }$. $$ \begin{aligned}\left(f-z\right)^2 = \color{blue}{f^2} -2 \cdot f \cdot z + \color{red}{z^2} = f^2-2fz+z^2\end{aligned} $$ |
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