Asked by help

Multiply
(1-x)(9-8x)
the answer that I came up with is
(x-1)(x-8)
can some help me and if I am wrong help me to solve
Answered by Reiny
now use FOIL for (x-1)(x-8)

(Broken Link Removed)

to get

x^2 - 9x + 8
Answered by Reiny
LOL
now that was not supposed to happen

here is the real link

http://www.freemathhelp.com/using-foil.html
Answered by help
Can you divide using the foil effect
the answer I got then is
8x^2-17x-9
Answered by Reiny
no, FOIL is an acronym used to multiply two binomials like you had.

(x-1)(x-8)

F -- multiply the "firsts" ---> (x)(x) = x^2
O -- multiply the 'outers' ---> (x)(-8) = -8x
I -- multiply the 'inners' ---> (-1)(x) = -x
L -- multiply the 'lasts' ---> (-1)(-8) = 8

so x^2 - 8x - x + 8
= x^2 - 9x + 8

I don't have a clue how you got your answer.


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