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

User Shihan Khan
by
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1 Answer

7 votes
7 votes

Answer:

81

Explanation:

Note the expansion of

(x - y)² = x² - 2xy + y² , thus

x² - 2xy + y² = (x - y)² = 9² = 81

User Youans
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