Quandaries
and Queries |
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I am having trouble solving the following problem. If x and y are integers, when will x squared+xy+(y-x) be even? I don't really know where to begin or how to even go about solving this problem. Please Help! Thanks -Lana |
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Hi Lana, I would do this with four cases. - Both x and y are even.
- Both x and y are odd.
- x is even and y is odd.
- y is even and x is odd.
Case 1.
Case 2.
I have left the other two cases for you. Penny |