It mean 4 channels at 50w each for a total of 200w. This amp would drive your component speakers just fine. You will want a much larger amp for subs.
Depends on the city. A lot where I live is 50w x 120L.
x + 4
50 refers to line class. W generally would mean it is a wider version of the reel
If you mean: x+4 = 38 then x = 34
If you mean: x-3-4 = 0 then x = 7 I mean x + ln (x-3) - 4 =0
Since 10w is a factor of 50w, it is automatically the GCF.
It means [ 4 x 4 x 4 x 4 ], and that's 256.
If you mean: (x-4)(x+12) then it is x^2 +8x -48
If you mean: x^2 +5x +4 then it is (x+4)(x+1) when factored
Assuming you mean x=9-4, x=5
The 50W is not a multiviscosity.
If you mean: x+4(x+5) then it is 5x+20