SOLUTION: {{{(x^2+9)(x^2-2y)}}} By using foil, I got: {{{x^4-2xy^2+9x^2-18y}}} This of course is the wrong answer according to the guide in the back of my textbook. So, I tried a few

Question 460452:
By using foil, I got:

This of course is the wrong answer according to the guide in the back of my textbook. So, I tried a few other things and keep getting the wrong answer. The correct answer is as follows:

For the life of me, I can't figure out how this could be right. Please help me understand this! Thank you in advance for your help!
Found 2 solutions by edjones, enidcoleslaw:
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Answer: x^4-2x^2y+9x^2-18y
Why doesn't the book's answer have a y someplace in it?
.
Ed
Answer by enidcoleslaw(1) (Show Source): You can put this solution on YOUR website!
I've been wondering the same thing, Ed. I really can't wrap my head around this problem. I'm getting most of my other answers correct. And if I do have something wrong, it's usually just a simple mistake that I've overlooked. This really doesn't make sense to me at all. Perhaps it's a printing error. I'll ask my professor in class.
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