(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2(1)(X一3)(X一2)十18=(X十9)(X十1)(2)(3X十4)(3X一4)<9(X一2)(X十3)

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(1)(X一3)(X一2)十18=(X十9)(X十1)(2)(3X十4)(3X一4)<9(X一2(1)(X一3)(X一2)十18=(X十9)(X十1)(2)(3X十4)(3X一4)<9(X一2)(X十

(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2(1)(X一3)(X一2)十18=(X十9)(X十1)(2)(3X十4)(3X一4)<9(X一2)(X十3)
(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2
(1)(X一3)(X一2)十18=(X十9)(X十1)
(2)(3X十4)(3X一4)<9(X一2)(X十3)

(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2(1)(X一3)(X一2)十18=(X十9)(X十1)(2)(3X十4)(3X一4)<9(X一2)(X十3)
第一题,x是1,第二题,x小于正负三分之五