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Multiply polynomial $ \, \color{blue}{ 20+10 } \, $ by $ \, \color{orangered}{ 3+7 }$.
Answer
$$ \left( \color{blue}{20+10} \right) \cdot \left( \color{orangered}{3+7} \right) = 300 $$
Explanation
Step 1: First we have to write polynomials in descending order.
$$ \begin{aligned}
P(x) &= 30 \\
Q(x) &= 10 \\
\end{aligned} $$