Answer
4$a^{2}$-7a+9
Work Step by Step
(-2$a^{2}$-5a)+(6$a^{2}$-2a+9)
=-2$a^{2}$-5a+6$a^{2}$-2a+9
=-2$a^{2}$+6$a^{2}$-5a-2a+9
=4$a^{2}$-7a+9
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