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Expansion of (a ± b ± c)²

Solve: 20x2...

Question

Solve: $20 x^{2} + 20 = 401 x$

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Solution

Now,
$20 x^{2} + 20 = 401 x$
or, $20 x^{2} - 401 x + 20 = 0$
or, $20 x^{2} - 400 x - x + 20 = 0$
or, $20 x (x - 20) - 1 (x - 20) = 0$
or, $(20 x - 1) (x - 20) = 0$
or, $x = \frac{1}{20}, 20$ .

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