Mathematics
Senior High

画像の問題の簡単な求め方を教えてくださいm(_ _)m

8 次の不等式または連立不等式を満たす整数xをすべて求めよ。 (1) x2-2x-4<0 (2) [x2+4x+1>0 lx2+6x-7≦0

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