Answer
$$(6x-5)(8x+5)=48x^2-10x-25$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(6x-5)(8x+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}48x^2+30x-40x-25 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}48x^2-10x-25\end{aligned} $$ | |
| ① | Multiply each term of $ \left( \color{blue}{6x-5}\right) $ by each term in $ \left( 8x+5\right) $. $$ \left( \color{blue}{6x-5}\right) \cdot \left( 8x+5\right) = 48x^2+30x-40x-25 $$ |
| ② | Combine like terms: $$ 48x^2+ \color{blue}{30x} \color{blue}{-40x} -25 = 48x^2 \color{blue}{-10x} -25 $$ |
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