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प्रश्न
Find the following product: (x − 11) (x + 4)
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उत्तर
Here, we will use the identity \[\left( x - a \right)\left( x + b \right) = x^2 + \left( b - a \right)x - ab\].
\[\left( x - 11 \right)\left( x + 4 \right)\]
\[ = x^2 + \left( 4 - 11 \right)x - 11 \times 4\]
\[ = x^2 - 7x - 44\]
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