Given P(z)=2z3+az2−11z−6P(z) = 2z^3 + az^2 - 11z - 6P(z)=2z3+az2−11z−6, find the value of aaa if P(−3)=0P(-3) = 0P(−3)=0.
a=1a = 1a=1
a=5a = 5a=5
a=−1a = -1a=−1
a=3a = 3a=3