A few days ago
4r^2 -25s^2/ 2r^2+3rs -20s^2?
4r^2 -25s^2/ 2r^2+3rs -20s^2?
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A few days ago
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factor the top and bottom and we get:
(2r-5s)(2r+5s)/(2r-5s)(r+4s)
the 2r-5s terms cancel each other and we are left with:
2r+5s/r+4s
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