Multiply Polynomials

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Multiply $(9u+5)(5u+1)$

**Answer**

$\;\;\; (9u+5)(5u+1)$

$=9u(5u+1)+5(5u+1)$

$=45u^{2}+9u+25u+5$

$=(45u^{2})+(9u+25u)+(5)$

$=45u^{2}+34u+5$