Mathematics
Senior High
（2）の求め方どなたか教えて下さい！
(2) mは定数とする。 2次方程式 x2+mx+9=0が実数解をもつときのmの値の範囲
を求めよ｡
(1) 異なる2つの虚数解
m≤-6, 6≤m
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