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If x ¤ y = (x + y)² - (x - y)²
Then √5 ¤ √5 =
A. 5
B. 10
C. 15
D. 20
E. 25
The symbol ¤ tells us what to do to x and y. We then follow these directions for the actual values for x and y given in the problem.
Hence, (2 √5)2 - (0)2 = 4.5 =20
 
 
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OmegaMoo
OmegaMoo
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Taken: 192 times
Added: 10/29/2008
Liked: 2 times
Taggged: Math, SAT
 
 
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