I am in Algebra and have not had problems solving equations until I started factoring polynomials. Please explain reverse foil method in steps.
Reverse foil method is the process of changing the form of an expression from one containing terms to factors. A general approach to factoring a trinomial uses the FOIL method in reverse. Its also called as a factoring method. This is also called as foil method binomials.
This method is same as spliting middle term
let we have binomial of following form
First find product of a and c i.e
Second factor ac into rand s i.e
`ac=rxxs` ,such that
if `ac>0` then `r+s=b`
if `ac<0 ` then `r-s=b`
Now taking common and we can factor
F - First, O - Outer, I - Inner and L - Last