**Simplify:(4x ^{2} – 2x) – (-5x^{2} – 8x).**

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Solution:(4x

^{2}– 2x) – (-5x^{2}– 8x)= 4x

^{2}– 2x + 5x^{2}+ 8x.= 4x

^{2}+ 5x^{2}– 2x + 8x.= 9x

^{2}+ 6x.= 3x(3x + 2).

Answer: 3x(3x + 2)