Mister Exam
x*log3(4-x)<=log5(x^2-8x+16) inequation
The solution
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log(4 - x) log\x - 8*x + 16/
x*---------- <= ------------------
log(3) log(5)
$$x \frac{\log{\left(4 - x \right)}}{\log{\left(3 \right)}} \leq \frac{\log{\left(\left(x^{2} - 8 x\right) + 16 \right)}}{\log{\left(5 \right)}}$$
x*(log(4 - x)/log(3)) <= log(x^2 - 8*x + 16)/log(5)
Solving inequality on a graph