Multiply polynomial $ \, \color{blue}{ 5+3x+2x^2+x^3 } \, $ by $ \, \color{orangered}{ 3+7x+4x^2+7x^3 }$.
Answer
$$ \left( \color{blue}{5+3x+2x^2+x^3} \right) \cdot \left( \color{orangered}{3+7x+4x^2+7x^3} \right) = 7x^6+18x^5+36x^4+64x^3+47x^2+44x+15 $$
Explanation
Explanation is too long to display.
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