(x+3²)-(x-1)(x-2)用因式分解,

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(x+3²)-(x-1)(x-2)用因式分解,

(x+3²)-(x-1)(x-2)用因式分解,
(x+3²)-(x-1)(x-2)用因式分解,

(x+3²)-(x-1)(x-2)用因式分解,
原式=(x+9)-(x²-3x+2)
=x+9-x²+3x-2
=-x²+4x+7
=-(x-2)²+11