Math Help - Simplify

1. Simplify

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

2. (X² + 5X + 6)(X + 1)

= X³ + X² + 5X² + 5X + 6X + 6
= X³ + 6X² + 11X + 6

Multiply 6 by x and 1 just like the rest of them.

r2

3. Originally Posted by ZeroPunk
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)
$(x^2+5x+6)(x+1)$

$x^2\times x+5x\times x+6\times x+x^2\times 1+5x\times 1+6\times 1$

$x^3+5x^2+6x+x^2+5x+6$

group like terms

$x^3+6x^2+11x+6$