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I got the answer but I don't understand what the -1 does

I got the answer but I don't understand what the -1 does-example-1
User Prmottajr
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2 Answers

3 votes
What he said sounds correct
User Bart Gijssens
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8.4k points
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The -1 affects the coefficient of the entire term.

Without the -1,
the term has a positive coefficient.
(3a)² = 9a²

However, with the -1,
the term has a negative coefficient.
-(3a)² = -9a²
User Downatone
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