mean or and

You can write this as

.

Squaring both sides, , . By the "rational root theorem" the only possible rational roots are x= 1, x= -1, x= 2, x= -2, x= 4, and x= -4. Try those to see if any are actually roots.

Almost trivial: . Assuming that "log" here means common logarithm, . Solve that quadratic equation.[*]

Similar to the first one isn't it? means so and .[*]

so .

Yes, that is correct.And for this problem, can you check if I solved it right:

[/quote]Thank you [/QUOTE]