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OpenStudy (anonymous):
Medals and fan!! :) log2(x)+log2(x+2) =3 I factored to get x^2+2x-8=0 but i dont know if im right? The answer is 2 at the back of the tb but i am unaware on how to reach that?? Help please
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OpenStudy (mertsj):
Factor x^2+2x-8 into (X+4)(x-2)
OpenStudy (anonymous):
but how come the answer is just 2 and not 2 and -4? @Mertsj
OpenStudy (mertsj):
Can't be -4 because 2 to any power is a positive number. In other words, the argument cannot be negative.
OpenStudy (anonymous):
Yay tysm :) @mertsj
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