This Question came up in a test i did today

(X+3)(X+2)(X+1)

What i did was multiply out the first two brackets

X² + 5x + 6

then i tried

(X²+5x+6)(X+1)

X³ + 5x then i get confused since i dont know what to multiply 6 by

X² + 5x² i can also work this bit out but i have no idea whats next.

So X³+X²+5x²+5x is what i got so far which can be simplified to X³+5X to the power of 4 + 5x