exam Maths Puzzle Numerical Ability

Can anyone help with this one? I need solution and steps.



Factor each polynomial completely.



x³y + 2x²y² + xy³

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exam Other Question
Given f(x) = 3 x+8 and g(x) = sqrt(x+3), find f ° g(4) and g ° f(4), giving exact answers (using sqrt if necessary). If y=square rootx-2, fill in the following table for x=0,1,2,3,4
x y
0
1
2
3
4
show all work

B) explain why no negative values are chosen as values to subsitute in f