(x+2)^2-(x-1)(x-2)因式分解

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(x+2)^2-(x-1)(x-2)因式分解

(x+2)^2-(x-1)(x-2)因式分解
(x+2)^2-(x-1)(x-2)因式分解

(x+2)^2-(x-1)(x-2)因式分解
(x+2)^2-(x-1)(x-2)
=x²+4x+4-(x²-3x+2)
=x²+4x+4-x²+3x-2
=7x+2

(x+2)²-(x-1)(x-2)
=x²+4x+4-x²+2x+x-2
=7x-2