oarozzi oarozzi

16-04-2020
Mathematics

contestada

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

Respuesta :

jimrgrant1 jimrgrant1

16-04-2020

Answer:

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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