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A rectangle's width is x and its length is 2x-1. Its area is 21. Find its dimensions.

my work so far:

21 = x(2x +1)
21 = 2x^2 + x

I was wondering how I would continue to solces this problem.

2 answers

The same way I already showed you ...

Check your sign error: 21 = x(2x-1)

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