factorise :- 121x²- 81y²
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Answered by
3
Answer:
121x² - 81y²
= (11x)² - (9y)²
= (11x + 9y) (11x - 9y)
Answered by
4
Answer:
(11x)²-(9y)²
(11x+9y)(11x-9y)
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