SOLUTION: {{{ log3 (x-9) + log3 (x-3)=2 }}}

3^2=(x-9)(x+3)
9=x^2-6x-27
x^2-6x-36=0
solve by quadratic formula:

a=1, b=-6, c=-36
ans:
x=-3.7 (reject)
or
x=9.7
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