Mathematics
Senior High
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28番の解き方を教えてください!
4
228(1)(x-2)?+1>0
*(2) x°+4x+6<0
(3) 2x°-4x+520 233
*(4) 3x°+6x+4<0
(5) 5x°-15x+20>0 *(6) 9x<6x-4
り24
229(1) 7x-13-x<0
197
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