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प्रश्न
Factorise the following expression:
7x − 42
योग
उत्तर
7x = 7 × x
42 = 2 × 3 × 7
The common factor is 7.
∴ 7x − 42
= (7 × x) − (2 × 3 × 7)
= 7 (x − 6)
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