Yes you can ... here is an example x^2-x=20, x^2-X-20 factored is (x-5)(x+4)
X^2/3 = 64


it is easier to first find square root of 64 and than power it to 3
square root of 64 is 8 which means our equation now looks like:
x = 8^3
now the answer is after powering 8 to 3:
x = 512
I think it is 96 but I could be wrong
15 minutes is 25% of an hour. You can tell this because there are exactly 4 15 minute periods in one hour.
Hope this helped.
X=12 is the answer, i have done this question before, hope i helped.