Tolong no 27,28,29 beserta caranya

No 27
Integral (9x^2 - 2x + 2) dx
9/(2+1) x^(x+1) - 2/(1+1) x^(1+1) + 2x + C
9/3 x^3 - 2/2 x^2 + 2x + C
3x^3 - x^2 + 2x + C
Jawabannya A

No 28
Integral dari -2 sampai -1 (2x+4) dx
                -1
[x^2 + 4x]
                -2
{(-1)^2 + 4(-1)} - {(-2)^2 + 4(-2)}
{1 -4} - {4 - 8}
1 - 4 - 4 + 8 = 1
Jawabannya E