SOLUTION: need help i tried cross multiplication w/ foil it the answer was -a^2 +b+2 but just putting them together it was (2-a)(1-b^2) {{{(2-a)/(1-b)}}}{{{""=""}}}{{{"?"/((1+b)(1-b))}}}

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: need help i tried cross multiplication w/ foil it the answer was -a^2 +b+2 but just putting them together it was (2-a)(1-b^2) {{{(2-a)/(1-b)}}}{{{""=""}}}{{{"?"/((1+b)(1-b))}}}      Log On


   

Question 773617: need help i tried cross multiplication w/ foil it the answer was -a^2 +b+2 but just putting them together it was (2-a)(1-b^2)
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Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
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Put an x where the question mark is:

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Cross multiply:

x(1-b) = (2-a)(1+b)(1-b)

Divide both sides by (1-b)

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Cancel the (1-b)'s:

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x = (2-a)(1+b)

or if you want to foil it out:

x = 2+2b-a-ab

Either answer will do.

Edwin