Write the logarithmic equation as an exponential equation: ln(x² +2x−11)=2x+4.

a) e^(2x+4) =x² +2x−11
b) e^(x² +2x-11) =2x+4
c) e^(2x) =x² +2x−11+4
d) e^(2x) =x² +2x−15