Answer
$$(7x-5)(2x+5)=14x^2+25x-25$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(7x-5)(2x+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}14x^2+35x-10x-25 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}14x^2+25x-25\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{7x-5}\right) $ by each term in $ \left( 2x+5\right) $. $$ \left( \color{blue}{7x-5}\right) \cdot \left( 2x+5\right) = 14x^2+35x-10x-25 $$ |
| ② | Combine like terms: $$ 14x^2+ \color{blue}{35x} \color{blue}{-10x} -25 = 14x^2+ \color{blue}{25x} -25 $$ |
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