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You need to be careful with your brackets...
Difference of two squares where one of your squares is 4, the other is (x+y)^2
ohhhh i see, it's a multiple choice and i just couldn't figure out where they were getting the right answer
so the correcy answer is 2 - x + y, why can't it be 2 + x + Y based on what you said?
It goes back to what I was saying about the brackets. You have to do some rearranging and put it in the appropriate form. What you could do is just expand out the factors that I gave you and then match them up. So\[(2-(x+y))(2+(x+y))=(2-x-y)(2+x+y)\]
When you look at your list, you only have 2 + x + y available to you.
oh, because of the negative sign, that where the bracket comes into play. it makes sense now, thank you very much
no worries. fan me if you haven't :) points hungry
will do...first time on the site, how do i fan you?
you just check a link that says "Become a fan" and leave it
it's next to my name...and it's blue