Question

solve, express solution in interval notation.
x^(4)<36x^(2)

Answer 1

So first, divide both side by x^2. We can do that if we assume x is not zero. Also note that when x is not zero, x^2 > 0, which means division by x^2 won't change the direction of the inequality.

hence

x^2 < 36

Now ... what x satisfy this relation?