Difference between revisions of "2006 AMC 10B Problems"

(Problem 1)
(Problem 2)
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== Problem 2 ==
 
== Problem 2 ==
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For real numbers <math>x</math> and <math>y</math>, define <math> x \spadesuit y = (x+y)(x-y) </math>. What is <math> 3 \spadesuit (4 \spadesuit 5) </math>?
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<math> \mathrm{(A) \ } -72\qquad \mathrm{(B) \ } -27\qquad \mathrm{(C) \ } -24\qquad \mathrm{(D) \ } 24\qquad \mathrm{(E) \ } 72 </math>
  
 
[[2006 AMC 12B Problems/Problem 2|Solution]]
 
[[2006 AMC 12B Problems/Problem 2|Solution]]

Revision as of 14:34, 13 July 2006

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