Selesaikan PD linear Legendre, di mana D=ddxD=\frac{d}{dx}D=dxd {(2x+1)2D2−2(2x+1)D−12}y=6x\left\lbrace\left(2x+1\right)^2D^2-2\left(2x+1\right)D-12\right\rbrace y=6x{(2x+1)2D2−2(2x+1)D−12}y=6x