Answers

2014-09-12T13:50:52+08:00
Using the foil method. x(x)+ (-4x+5x)+(-4)(5)
You will get the answer x²+x-20 :) 
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2014-09-12T13:56:48+08:00

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FOIL Method is the best method to find the answer were F=x^2,O=5x,I=-4x,L=-20  Combine like terms so the answer is x^2+1x-20
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