Answer
-7$x^{2}$-2x-5.6
Work Step by Step
($x^{2}$-x+1.1)+(-8$x^{2}$-x-6.7)
=$x^{2}$-x+1.1-8$x^{2}$-x-6.7
=-7$x^{2}$-2x-5.6
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