We are given the expression:
[tex]5x+2y^{2}-y^{3}[/tex]
Now we have to determine the value of this expression at x=2 and y=4.
So let us plug the values of x and y in the expression:
[tex]5(2)+2(4)^{2}-(4)^{3}[/tex]
[tex]=10+32-64[/tex]
=-22
So on plugging x=2 and y=4 in the given expression we get the value as -22
Answer : [tex]5x+2y^{2}-y^{3}[/tex]=-22
