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OpenStudy (anonymous):
nothing
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OpenStudy (anonymous):
Fire away!
OpenStudy (anonymous):
For the first one, you've got to make a difference of squares function that could be x squared - some number squared. right?
OpenStudy (anonymous):
see for example x^2 - 9 = (x-3)(x+3) <- these are the factors
OpenStudy (anonymous):
x^2 + 9
OpenStudy (anonymous):
this is downright confusing!!
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OpenStudy (anonymous):
Actualy x^2 + 9 is not that.. thats (x+3i)(x-3i)
OpenStudy (anonymous):
yes bingo
OpenStudy (anonymous):
just expand a perfect square (x-2)^2 = x^2 + 4 - 4x
OpenStudy (anonymous):
Exactly
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