$\displaystyle (x - y)^2 + 13(x - y) + 42$

Please someone help me or something. I have no idea how to do this at all.

Like what do I do when its $\displaystyle (x - y)^2$?

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- May 8th 2008, 02:16 PMlax600No idea how to do this
$\displaystyle (x - y)^2 + 13(x - y) + 42$

Please someone help me or something. I have no idea how to do this at all.

Like what do I do when its $\displaystyle (x - y)^2$? - May 8th 2008, 02:30 PMicemanfan
- May 8th 2008, 02:31 PMlax600
I need to factor it... so I still expand it?

- May 8th 2008, 02:34 PMicemanfan
$\displaystyle (x - y)^2 + 13(x - y) + 42$ is about as factored as it gets. One thing you can do:

$\displaystyle (x - y + 13)(x - y) + 42$ - May 8th 2008, 02:51 PMlax600
I just asked my dad how to do this and he replys:

$\displaystyle (x - y)^2 - 13(x - y) + 42$

if $\displaystyle (x - y)^2 - 14(x - y) + 49$

$\displaystyle (x - y)^2 - 2*7*(x - y) + 7^2$

a =$\displaystyle (x - y)^2$

b =$\displaystyle 7$

$\displaystyle (x - y)^2 - 13(x - y) + 42

= [(x - y)^2 - 14(x - y) + 49]

={[(x - y) - 7]^2 + [(x - y) - 7]}$

$\displaystyle =(x - y -7){x - y - 7}

=(x - y - 7)(x - y - 6)$ - May 8th 2008, 02:58 PMicemanfan
- May 8th 2008, 03:01 PMlax600
oh