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If x(x+y) = x^2 + 8, what is the value of xy?

 Aug 21, 2024
 #1
avatar+1950 
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First, let's distribute and expand the left side of the equation. 

Using the distributive property, we find that

x2+xy=x2+8

 

Now, notice that the x^2 cancels out. 

xy=x2x2+8xy=8

 

So 8 is our answer. 

 

Thanks! :)

 

*1700 points

 Aug 21, 2024
edited by NotThatSmart  Aug 21, 2024

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