Mathematics
Senior High
解答が手元の答えの冊子に載ってなかったので教えて下さると嬉しいです
91
2次方程式(a+2)x?+2(a-1)x-a=0は異なる2つの実数解をもつことを示せ。ただし, aキー2
とする。(15点)
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