Factorise : 1 – 121x2
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Answer:
(1 + 11x) (1 - 11x)
Step-by-step explanation:
Identity – a² - b² = (a+b)(a-b)
1 - 121x²
= (1)² - (11x)²
= (1 + 11x) (1 - 11x)
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