hopen2impov
Junior Member
- Joined
- Aug 4, 2010
- Messages
- 66
factor completely
-x^3 +x^2 +42x
(x -6) (x -7)
-x^3 +x^2 +42x
(x -6) (x -7)
hopen2impov said:-x^3 +x^2 +42x
(x -6) (x -7)
Look what happens when we expand your result (i.e., "multiply everything out").
(x - 6)(x - 7) = x^2 - 13x + 42
This quadratic polynomial (2nd-degree polynomial) does not match the given cubic polynomial (3rd-degree polynomial).
So, your answer is not correct.
If you're hopen2impov, you should be more careful: equation is -x^3 + x^2 + 42xhopen2impov said:-x^3 +x^2 +42