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प्रश्न
Factorise.
x2 + 9x + 18
उत्तर
\[\ x^2 + 9x + 18\]
\[ = x^2 + 6x + 3x + 18\]
\[ = x\left( x + 6 \right) + 3\left( x + 6 \right)\]
\[ = \left( x + 3 \right)\left( x + 6 \right)\]
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