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FOIL stands for -First- -Outer- -Inner- -Last- each letter of FOIL is the first letter of the four words just mentioned. this is called an acronym.
FOIL is used to factor expressions. Here are a few examples.
(x + 5)(x - 3) [Use the first, outer, inner, last method)
x2 [this is first... its the two x's multiplied together. the x's are the first terms in the problem]
x2 - 3x [this is outer... the -3 and the x are multiplied together. the -3 and the x are the outer terms]
x2 - 3x + 5x [this is inner... the 5 and x are multiplied together. the 5 and x are the inner terms]
x2 - 3x + 5x -15 [this is last... the 5 and -3 are multiplied together. the 5 and -3 are the last terms]
Now add like terms and you get...
x2 + 2x - 15 this is your final answer
This is how you do an expression using FOIL. You go from (x+5)(x-3) to x2+2x-15
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Does the square of x -23 has a solution?
(X - 23)2= X2 - 46X + 529==============Not a solution but an expanded expression.(X - 23)(X - 23)------------------------Distribute by FOIL for above quadratic expression.
Where can the foil method be used?
When multiplying out the brackets in a quadratic equation or expression: f = first o = outer i = inner l = last
What does the F stand for in FOIL?
First. FOIL.. First, Outside, Inside, Last
The foil method is used for?
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.
Is the foil method used for factoring quadratic equations?
Yes FOIL method can be used with quadratic expressions and equations
