If ∫0k(3z2+2z)dz=5\int_0^k (3z^2 + 2z) dz = 5∫0k(3z2+2z)dz=5, which of the following is true?
k3+k2−5=0k^3 + k^2 - 5 = 0k3+k2−5=0
k3+k2+5=0k^3 + k^2 + 5 = 0k3+k2+5=0
3k3+2k2=53k^3 + 2k^2 = 53k3+2k2=5
k2+k=5k^2 + k = 5k2+k=5