(x+3)(x-2)-(x+1)^2=-1

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(x+3)(x-2)-(x+1)^2=-1
(x+3)(x-2)-(x+1)^2=-1

(x+3)(x-2)-(x+1)^2=-1
原方程可化为:
x^2+x-6-x^2-2x-1=-1
-x=6
x=-6

x^2+x-6-(x^2+2x+1)+1=0
x^2+x-6-x^2-2x-1+1=0
-x-6=0
x=-6

先展开得:x^2+x-6-x^2-2x-1=-1
化简得:-x-7=-1
x=-6

(x+3)(x-2)-(x+1)^2=-1
(x+3)(x-2)-(x+1)^2+1=0
x^2-2x+3x-6-(x^2+2x+1)+1=0
x^2-x^2-2x+3x-2x-6-1+1=0
-x-6=0
x=-6

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