Question
Answer
$$2x\cdot5x+3x(x+2)=13x^2+6x$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2x\cdot5x+3x(x+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}10x^2+3x^2+6x \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}13x^2+6x\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3x} $ by $ \left( x+2\right) $ $$ \color{blue}{3x} \cdot \left( x+2\right) = 3x^2+6x $$ |
| ② | Combine like terms: $$ \color{blue}{10x^2} + \color{blue}{3x^2} +6x = \color{blue}{13x^2} +6x $$ |
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