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For all numbers x and y the definition of the operation [#permalink]
Given that \(x♦ y=xy(x+4)\) and \((-6) ♦ a = -60,\) and we need to find the value of a

To find (-6) ♦ a we need to compare what is before and after ♦ in (-6) ♦ a and x♦ y

=> We need to substitute x with -6 and y with a in x♦ y to get the value of (-6) ♦ a

=> \(-6♦ a=-6*a(-6+4)\) = -6a*-2 = 12a = -60 (given)
=> a = \(\frac{-60}{12}\) = -5

So, Answer will be B
Hope it helps!

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Re: For all numbers x and y the definition of the operation [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: For all numbers x and y the definition of the operation [#permalink]
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