Final answer to the problem
$25x^2-500xy^2-10400y^2$
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Step-by-step Solution
Specify the solving method
1
Multiply the single term $-100y^2$ by each term of the polynomial $\left(5x+104\right)$
$25x^2-500xy^2-10400y^2$
Final answer to the problem
$25x^2-500xy^2-10400y^2$