3 years ago

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

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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