-(x²-2x)+(-3x+2x²)化简!化简:-(x²-2x)+(-3x+2x²)-2(a²-3ab)-3(ab-2a²)

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-(x²-2x)+(-3x+2x²)化简!化简:-(x²-2x)+(-3x+2x²)-2(a²-3ab)-3(ab-2a²)

-(x²-2x)+(-3x+2x²)化简!化简:-(x²-2x)+(-3x+2x²)-2(a²-3ab)-3(ab-2a²)
-(x²-2x)+(-3x+2x²)化简!
化简:
-(x²-2x)+(-3x+2x²)
-2(a²-3ab)-3(ab-2a²)

-(x²-2x)+(-3x+2x²)化简!化简:-(x²-2x)+(-3x+2x²)-2(a²-3ab)-3(ab-2a²)
-(x²-2x)+(-3x+2x²)
=-x²+2x-3x+2x²=x²-x=x(x-1)
-2(a²-3ab)-3(ab-2a²)
=-2a²+6ab-3ab+6a²
=4a²+3ab
=a(4a+3b)