When multiplying out the brackets in a quadratic equation or expression:
f = first
o = outer
i = inner
l = last
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The foil method in algebra is used to "multiply linear binomials."The FOIL method is used in elementary algebra as a guide for solving algebraic problems.
Yes FOIL method can be used with quadratic expressions and equations
The FOIL Method is a process used in algebra to multiply two binomials.f= first termso= outer termsi= inner termsl= last terms
(a+b)(b-a)
It is only not needed if you know of another method. If FOIL is the only way you know to multiply two binomials, then it is definitely needed.