The easy way to factor a polynomial with four terms grouping

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 integers. To factor an algebraic expression means to break it up into expressions that can be multiplied together to get the original expression.

When a given polynomial expression can be grouped in such a way that the different groups have a common GCF, then the polynomial can be factored by grouping. To factor a polynomial by grouping, we first group the polynomial into groups having common GCF, then we factor out the common GCF.
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