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Carley Cobb
Mathematics
7 April, 17:28
If x - y = 9, then x2 - 2xy + y2 =
+5
Answers (
1
)
Riya Hale
7 April, 17:49
0
81
Step-by-step explanation:
Note the expansion of
(x - y) ² = x² - 2xy + y², thus
x² - 2xy + y² = (x - y) ² = 9² = 81
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