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प्रश्न
Find the Factors of the Polynomial Given Below.
2x2 + x – 1
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उत्तर
2x2 + x – 1
= 2x2 + 2x - x - 1 ...\[\begin{array}{cc}
\ce{2 ×-1=-2}\\
\phantom{..........}/\backslash\\
\phantom{...........}\ce{2}\phantom{..}\ce{-1}\phantom{}
\end{array}\]
= 2x (x + 1) - 1(x + 1)
= (x + 1) (2x - 1)
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