nene91
nene91
03-02-2017
Mathematics
contestada
divide r+5/r^2+5r-14 by r^2+4r-21/r-2
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Аноним
Аноним
03-02-2017
r+5
r^2+4r-21
-------------- / --------------------
r^2+5r-14
r-2
r+5 r-2
= -------------- x --------------------
r^2+5r-14 r^2+4r-21
r+5 r-2
= -------------- x --------------------
(r+7)(r-2) (r+7)(r-3)
r+5
= -----------------
(r+7)^2 (r-3)
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