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Multiply the polynomials.

$\left({5x-4}\right)\left({x+9}\right)=$

Solution

We use the FOIL technique: First Outside Inside Last. $\begin{aligned} \left({5x-4}\right)({x+9})&={5x^{2}+45x-4x-36}\\ &={5x^{2}+41x-36} \end{aligned}$

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