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5y^{2}-4y-15
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5y^{2}-4y-15
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15y^{2}-3y+10-10y^{2}-y-25
To find the opposite of 10y^{2}+y+25, find the opposite of each term.
5y^{2}-3y+10-y-25
Combine 15y^{2} and -10y^{2} to get 5y^{2}.
5y^{2}-4y+10-25
Combine -3y and -y to get -4y.
5y^{2}-4y-15
Subtract 25 from 10 to get -15.
15y^{2}-3y+10-10y^{2}-y-25
To find the opposite of 10y^{2}+y+25, find the opposite of each term.
5y^{2}-3y+10-y-25
Combine 15y^{2} and -10y^{2} to get 5y^{2}.
5y^{2}-4y+10-25
Combine -3y and -y to get -4y.
5y^{2}-4y-15
Subtract 25 from 10 to get -15.
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