Answer
False
Work Step by Step
Let us consider the differential equation
$D^2 y=0$
The general solution is: $y(x)=b_1+b_2x$ and $xy(x)=b_1x+b_2x^2$
Let us consider the differential equation
$D^4 y=0$
The general solution is: $y(x)=c_1+c_2x+c_3x^2+c_4x_3$
Therefore, the given statement is False.