(x-2)×(x+3)+4 =
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(x-2)×(x+3)+4 =
(x-2)×(x+3)+4 =
(x-2)×(x+3)+4 =
(x-2)×(x+3)+4
=x^2+x-6+4
=x^2+x-2
=(x-2)(x+1)
(x-2)×(x+3)+4
=x^2+x-6+4
=x^2-x-2
=(x-2)(x+1)
(x+2)(x-1)
(x+2)*(x-1)=0
x方+x-2 =(x-2)(x+1)
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