11x^2 -6x-9
Step-by-step explanation:
9x^2 - 10x +1 - (-2x^2) + 4x - 10.
The opposite of -2x^2 is 2x^2
9x^2 -10x+1+2x ^2 +4x-10
Combine 9x^2 and 2x^2 to get 11x^2 .
11x^2 -10x+1+4x-10
Combine -10x and 4x to get -6X.
11x^2-6x+1-10
Subtract 10 from 1 to get -9.
11x^2 -6x-9
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