3x^2-x-9-(x^2+10x+11)= I keep getting 2x^2-11x-20, but its wrong. help!

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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3x^2-x-9-(x^2+10x+11)= I keep getting 2x^2-11x-20, but its wrong. help!

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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how do you know its wrong
carefully check the original
even i'm getting the same

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i entered it and it says its wrong in my homework online
@triciaal pls show us the right path
same path that's why I suggested the original
what result do you get @triciaal
same
@Kimes i guess you copied wrong
oh i forgot the - in (x^2+10x+11) so its 3x^2-x-9-(-x^2+10x+11)
see
so sorry
its ok now pls solve it correctly
I was correct carefully check the original
i got 4x^2-11x-20
|dw:1440998467722:dw|
agreed

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