SOLUTION: Write the resulting polynomial in standard form. (x+y+1)(x+y-1)
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Question 348034: Write the resulting polynomial in standard form. (x+y+1)(x+y-1)
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The quick and easy way to do this one is to recognize that you have a pair of conjugates if you consider 
as a single term and 1 as the other term.
\ +\ 1\right)\left((x\ +\ y)\ -\ 1\right)\ =\ \left(x\ +\ y\right)^2\ -\ 1)
Then expand the binomial to get:
^2\ -\ 1\ =\ x^2\ +\ 2xy\ +\ y^2\ -\ 1)
John
My calculator said it, I believe it, that settles it
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