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nCr Definitions and Properties

Find the fact...

Question

Find the factors of the quadractic equation given below.
$2 x^{2} + x - 1 = 0$

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Solution

$2 x^{2} + x - 1 = 2 x^{2} + 2 x - x - 1 = 0$
$= (2 x - 1) (x + 1) = 0$

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