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anonymous

  • 5 years ago

which of the following is a factor of this equation: 4-(x + Y)^2 -(x + y)^2 x + y 2 - x + y 2 + x + y 4 + x + Y

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  1. anonymous
    • 5 years ago
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    You need to be careful with your brackets...

  2. anonymous
    • 5 years ago
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    \[4-(x+y)^2=(2-(x+y))(2+(x+y))\]

  3. anonymous
    • 5 years ago
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    Difference of two squares where one of your squares is 4, the other is (x+y)^2

  4. anonymous
    • 5 years ago
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    ohhhh i see, it's a multiple choice and i just couldn't figure out where they were getting the right answer

  5. anonymous
    • 5 years ago
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    so the correcy answer is 2 - x + y, why can't it be 2 + x + Y based on what you said?

  6. anonymous
    • 5 years ago
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    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\[(2-(x+y))(2+(x+y))=(2-x-y)(2+x+y)\]

  7. anonymous
    • 5 years ago
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    When you look at your list, you only have 2 + x + y available to you.

  8. anonymous
    • 5 years ago
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    oh, because of the negative sign, that where the bracket comes into play. it makes sense now, thank you very much

  9. anonymous
    • 5 years ago
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    no worries. fan me if you haven't :) points hungry

  10. anonymous
    • 5 years ago
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    will do...first time on the site, how do i fan you?

  11. anonymous
    • 5 years ago
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    you just check a link that says "Become a fan" and leave it

  12. anonymous
    • 5 years ago
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    it's next to my name...and it's blue

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