This can be a great way to check your work or to see How to factor an equation with 4 terms.

Just follow these steps: Break up the polynomial into sets of two. You can go with ( x3 + x2) + (– x – 1). Put the plus sign between the sets, just like when you factor trinomials.

Learn how to factor polynomials by grouping. A polynomial is an expression of the form ax^n + bx^ (n-1) + . . . + k, where a, b, and k are constants and the exponents are positive