Mathematics
Senior High
2次不等式をとく問題なんですけど、グラフを使う方法と式を教えていただければありがたいです🙇♀️
*(2) x2+2x+4N0
(3) x+4x+5<0
*(4) -x+6x-1020
*(5) 2x°+4x+7>0
-16x2+8x-320
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