Question

Multiply:

(xD - 1)(xD+2)

note: this is differential equations NOT algebra

Answer 1

\[x^2D^2 + xD(2) - xD - 2 \implies x^2D^2 - xD - 2 \qquad ( since \; D(2) = 0)\]

Answer 2

is that equal to (xD + 2)(xD - 1) as well?

Answer 3

@waterineyes

Answer 4

It will become:

\[x^2D^2 + 2xD - 2\]

So not equal..

Answer 5

AHHHH