(X+1)(X–2)=3X+3求解

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(X+1)(X–2)=3X+3求解(X+1)(X–2)=3X+3求解(X+1)(X–2)=3X+3求解X²+X-2X-2=3X+3X²-X-2=3X+3X²-4X-5=0

(X+1)(X–2)=3X+3求解
(X+1)(X–2)=3X+3求解

(X+1)(X–2)=3X+3求解
X²+X-2X-2=3X+3
X²-X-2=3X+3
X²-4X-5=0
(X-5)(X+1)=0
X=-1或者X=5

(X+1)(X-2)=3(X+1)
(X+1)(X-5)=0
X=-1或5

5，-1

x^2-x-2-3x-3=0
x^2-4x-5=0
(x-5)(x+1)=0
x=5 或者-1

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