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Bbrown · Answer 1 · 2023-07-18T05:12:32+0000

Answer:

(10x - 9y)(10x + 9y)

Explanation:

100x² - 81y² ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

100x² - 81y²

= (10x)² - (9y)²

= (10x - 9y)(10x + 9y)