factorize
81 x2 - 121y2
pls help
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Answer:
(9x+11y)(9x-11y)
Step-by-step explanation:
81x² -121y²
=> (9x)² - (11y)²
using identity a²-b² = (a+b)(a-b)
=> (9x)² - (11y)² = (9x+11y)(9x-11y)
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