If #216 * 3^(2x)-73*3^x-3=0# and #u=3^x#, what is the value of #u#?
Using the quadratic formula (and a calculator)
and therefore the negative version is extraneous,
As a bonus we could find the value of
then using a calculator
The equation is in the form,
Since it is difficult to use
Once we solve for u, we will then replace u with 3^x and find the value of x.