<PRE><B>Question 303430</B>
x^3 - x^2 - 42x 

x(X^2-x-42)

x(x^2-7x+6x-42)

x{x(x-7)-6(x-7)}

x{(x-6)(x-7)}
x(x-6)(x-7)
..
.
-33x + 15 + 6x^2

6x^2-33x+15

6x^2-30x-3x15

6x(x-5)-3(x-5)

(x-5)(6x-3)

3((x-5)(2x-1)

</PRE>