First
Outer
Inner
Last
it is a way of remembering how to multiply binomials
it tells which terms to multiply
example
(x+3)(x+4)
First (multiply first terms)
x times x=x²
Outer (multiply outer terms)
x times 4=4x
Inner (multiply inner terms)
3 times x=3x
Last (multiply last terms)
3 times 4=12
now add them all
x²+4x+3x+12
x²+7x+12
that is what FOIL is
4*4= 16 + 16= 32 :) You could do 4 * 4 that equals 16 then add 16 to that to get over 28.
It is 6 because it is the greatest number that can be multiplied by another number and still get 18 and 24 as the answer
there are no inflection points, because it never changes concavity, is just a constant and thus for any region over the x-axis, will always be a positive value, and thus is always "concave up".