Answer:
x^3 + 5x^2y - 2x^3y - 10x^2 y^2
Explanation:
multiply x with x^2
that means (x).(x).(x)
which gives x^3
multiply x by 5xy
that means (x).5.(x).(y)
which gives 5x^2y
myltiply -2xy by x^2
that means (-2).(x).(y).(x)
which gives -2x^3y
multiply -2xy by 5xy
that means (-2).(x).(y).(5).(x).(y)
which gives -10x^2 y^2