(1)x^2-x-2>0 (2)-x^2-2x+3>0

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(1)x^2-x-2>0 (2)-x^2-2x+3>0
(1)x^2-x-2>0 (2)-x^2-2x+3>0

(1)x^2-x-2>0 (2)-x^2-2x+3>0

x²-x-2>0
(x-2)(x+1)>0
∴x<-1,x>2
-x²-2x+3>0
x²+2x-3<0
(x+3)(x-1)<0
∴-3

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