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Let x\mathbin{\spadesuit}y = x^2/y for all x and y such that y\neq 0. Find all values of a such that a\mathbin{\spadesuit} 3 = 9. List the values you find in increasing order, separated by commas.

 Nov 11, 2014

Best Answer 

 #1
avatar+130511 
+5

So we have

a2 / 3 = 9    multiply both sides by 3

a2 = 27       take the square root of both sides

a = -√27, √27   or, simplified  -3√3 ,  3√3

 

 Nov 11, 2014
 #1
avatar+130511 
+5
Best Answer

So we have

a2 / 3 = 9    multiply both sides by 3

a2 = 27       take the square root of both sides

a = -√27, √27   or, simplified  -3√3 ,  3√3

 

CPhill Nov 11, 2014
 #2
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0

Thank you!

 Nov 11, 2014

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