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OpenStudy (anonymous):
(1 - 7x)(1 + 9x)
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OpenStudy (anonymous):
-63x^2+2x+1
jimthompson5910 (jim_thompson5910):
Hint: (1 - 7x)(1 + 9x) expands out to 1(1 + 9x) - 7x(1 + 9x)
jimthompson5910 (jim_thompson5910):
Distribute that out and combine like terms to simplify.
OpenStudy (anonymous):
1+2x-63x^2 63x^2+2x+1
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