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3y^{2}-2y-4-y^{2}+3y-7
To find the opposite of y^{2}-3y+7, find the opposite of each term.
2y^{2}-2y-4+3y-7
Combine 3y^{2} and -y^{2} to get 2y^{2}.
2y^{2}+y-4-7
Combine -2y and 3y to get y.
2y^{2}+y-11
Subtract 7 from -4 to get -11.
3y^{2}-2y-4-y^{2}+3y-7
To find the opposite of y^{2}-3y+7, find the opposite of each term.
2y^{2}-2y-4+3y-7
Combine 3y^{2} and -y^{2} to get 2y^{2}.
2y^{2}+y-4-7
Combine -2y and 3y to get y.
2y^{2}+y-11
Subtract 7 from -4 to get -11.