factorise (121-16/81p^2)
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- 121 -16P²/81
- ➽ 11² - (4P/9)²
- ➶➶ Useing Formula➶➶
- ➽ (a²-b²) = (a-b)(a+b)
- ➽ 11² - (4P/9)²
- ➽ (11 - 4p/9)(11 - 4p/9)
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