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oee [108]
3 years ago
7

(12y2+17y-4)+9y2-13y+3)

Mathematics
1 answer:
Flura [38]3 years ago
7 0
(12y^2+17y-4)+(9y^2-13y+3)=12y^2+9y^2+17y-13y-4+3=\\\\=21y^2+4y-1
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