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x^{2}+15x-1-2x^{2}+11x-3
To find the opposite of 2x^{2}-11x+3, find the opposite of each term.
-x^{2}+15x-1+11x-3
Combine x^{2} and -2x^{2} to get -x^{2}.
-x^{2}+26x-1-3
Combine 15x and 11x to get 26x.
-x^{2}+26x-4
Subtract 3 from -1 to get -4.
x^{2}+15x-1-2x^{2}+11x-3
To find the opposite of 2x^{2}-11x+3, find the opposite of each term.
-x^{2}+15x-1+11x-3
Combine x^{2} and -2x^{2} to get -x^{2}.
-x^{2}+26x-1-3
Combine 15x and 11x to get 26x.
-x^{2}+26x-4
Subtract 3 from -1 to get -4.