## Algebra: A Combined Approach (4th Edition)

The numbers are 6 and 1. Thus 7x is split into 6x + 1x , where the product of the numeric coefficient is 6, i.e., ( 6 $\times$ 1 = 6), And sum is = 7, i.e., (6 + 1 = 7). Thus $x^{2}$ + 7x + 6 = $x^{2}$ + 6x + x +6