Integrate[(x - Subscript[x, i])^2 (x - Subscript[x, i + 1])^2, {x,
Subscript[x, i - 1], Subscript[x, i + 1]}]
Please i Need help to get this answer, i'll be very thankful.
the answer is:
-1/30 (Subscript[x,i-1]-Subscript[x,i+1])^3 (6(Subscript[x,i-1])^2+10(Subscript[x,i])^2-5(Subscript[x,i])(Subscript[x,i+1])+(Subscript[x,i+1])^2-15Subscript[x,i-1]Subscript[x,i]+3Subscript[x,i-1]Subscript[x,i+1])
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