If $220^{2} - 620 + k = 0$ , then find the value of $k$ .

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Solution

$220^{2} - 620 + k = 0$
$\Rightarrow k = - 220^{2} + 620$
$= - 48400 + 620$
$\Rightarrow k = - 47780$
Hence, the answer is $- 47780.$

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