Tamara J. answered 04/22/13
Math Tutoring - Algebra and Calculus (all levels)
27(x - 3) + 6x(x - 3) - x2(x - 3)
All three terms share a common factor, which is x - 3 . So if we factor out this binomial from all three terms, we get
(x - 3)(27 + 6x - x2)
Now we can further factor the trinomial and arrive at the following:
(x - 3)(3 + x)(9 - x)
Rearranging the terms in the last two binomials so that the variable, x, is the first terms we get...
(x - 3)(x + 3)(-x + 9)
Factor out a -1 from the last binomial:
(x - 3)(x + 3)(-1)(x - 9)
(-1)(x - 3)(x + 3)(x - 9)
-(x - 3)(x + 3)(x - 9)