Question 721919
<pre>
I'd use trial and error since 2 is prime:

2nē - 11n - 63

The only two integers you can multiply to get 2 are 2 and 1,
so write:

(2x    )(x    )

The only way to factor 63 are

1*63
3*21
7*9
9*7
21*3
63*1

The last sign is - so we are looking for a difference
Start trying the factors that are closest together first:

(2x   9)(x   7)  outer product = 14x, inner product = 9x, difference = 5x 

(2x   7)(x   9)  outer product = 18x, inner product = 7x, difference = 11x

So the last one will do it if we place the signs so that the
outer product and the inner product combine to -11x.  So we get

(2x + 7)(x - 9)

Edwin</pre>