g(x)=5x/(x-4)^2
↓
0=5x(x-4²)
5x×(x-4²)=0
x×(×-4²)=0
x×(16)=0
=0
x-16=0
x=16
x¹=0,x²=16
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Answers & Comments
g(x)=5x/(x-4)^2
↓
0=5x(x-4²)
↓
5x×(x-4²)=0
↓
x×(×-4²)=0
↓
x×(16)=0
↓
=0
x-16=0
↓
=0
x=16
↓
x¹=0,x²=16