In this problem, f(x) = 2x+1 & g(x) = 3x^2,
which represents g(f(x)) ?
The answer is 12x^2 + 3 ...
so that means within solving it, I showered the power.
BUT when it came to a problem like this,:
x+2 = square root of x + 8,
[once you're in the middle of the steps,
it seems like you could shower the power,
but in reality you use foil to get the answer] ..
So yeah. I know you can't shower the power
when the sign is negative, so therefore,
you do it when it's positive. How should I know
when to use FOIL or just shower the power ?
2007-12-09
17:17:30
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3 answers
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asked by
meh
2
in
Mathematics