If x - y = 9, then x2 - 2xy + y2 =

asked Oct 14, 2021 221k views

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7 votes

Answer:

Explanation:

Note the expansion of

(x - y)² = x² - 2xy + y² , thus

x² - 2xy + y² = (x - y)² = 9² = 81

Youans answered Oct 19, 2021

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