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प्रश्न
Factorise the expression.
7p2 + 21q2
योग
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उत्तर
7p2 + 21q2
= 7 × p × p + 3 × 7 × q × q
7 (p2 + 3q2)
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अध्याय 12: Factorisation - EXERCISE 12.2 [पृष्ठ १५१]
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