化简(x+1)(x-2)+(x-3)的2次方-x(x-5)

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化简(x+1)(x-2)+(x-3)的2次方-x(x-5)化简(x+1)(x-2)+(x-3)的2次方-x(x-5)化简(x+1)(x-2)+(x-3)的2次方-x(x-5)(x+1)(x-2)+(x

化简(x+1)(x-2)+(x-3)的2次方-x(x-5)
化简(x+1)(x-2)+(x-3)的2次方-x(x-5)

化简(x+1)(x-2)+(x-3)的2次方-x(x-5)
(x+1)(x-2)+(x-3)的2次方-x(x-5)
=x²+x-2x-2+x²-6x+9-x²+5x
=x²-2x+7