Answer
-$x^{2}$ - x
Work Step by Step
(5$x^{2}$ - 2x + 1) + (-6$x^{2}$ + x - 1)
5$x^{2}$ - 2x + 1 + -6$x^{2}$ + x - 1 Remove paranthesis
(5$x^{2}$ -6$x^{2}$) + (-2x+ x) + (-1 + 1) Combine like terms
-1$x^{2}$ - x
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