Answer
$$(4x+5)(x\cdot2-2x+5)=20x+25$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(4x+5)(x\cdot2-2x+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}(4x+5)\cdot5 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}20x+25\end{aligned} $$ | |
| ① | Combine like terms: $$ \, \color{blue}{ \cancel{2x}} \, \, \color{blue}{ -\cancel{2x}} \,+5 = 5 $$ |
| ② | $$ \left( \color{blue}{4x+5}\right) \cdot 5 = 20x+25 $$ |
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