What is the form of a particular solution of the following differential equation?x² - 6x + 9 = e³ˣ
a) The particular solution has the form Ax²e³ˣ + Bxe³ˣ + Ce³ˣ + D
b) The particular solution has the form Ax²e³ˣ + Bxe³ˣ + Ce³ˣˣ + Dxe³ˣ
c) The particular solution has the form Ax²e²ˣ + Bxe³ˣ + Ce³ˣ + Dxe³ˣ+ E
d) The particular solution has the form Ax²e³ˣ + Bxe³ˣ + Ce³ˣ + Dxe³ˣ+ Ee³ˣ