Question

which of the following gives the complete solution set for the equation logbase2(x-1)+logbase2(x+1)=3
A) 3
b)3, -3
c) 3/2
d)4,-4

Answer 1

3 gives 1+2=3 so that is good

Answer 2

-3 is out because you cannot take the log of a negative number. -4 is out for the same reason

Answer 3

and 3/2 is just silly

Answer 4

thank you !