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Akar-akar persamaan kuadrat x2 +(m−2)x +(m+5) =0 mempunyai akar akar real. Nilai m adalah ...

Pertanyaan

Akar-akar persamaan kuadrat straight x squared space plus left parenthesis straight m minus 2 right parenthesis straight x space plus left parenthesis straight m plus 5 right parenthesis space equals 0 mempunyai akar akar real. Nilai m adalah ...

  1. negative space 8 space less than space straight m space less than space 8

  2. straight m space less than negative 2 atau space straight m space greater than space 2

  3. negative 2 space less than space straight m space less than space 2

  4. straight m space less than negative 4 atau straight m space greater than space 4

  5. negative space 4 space less than space straight m spaceatau less than space 4

H. Nufus

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

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Pembahasan

straight D greater than 0  straight b squared space minus space 4 ac space greater than space 0  left parenthesis straight m minus 2 right parenthesis squared space minus space 4 left parenthesis 1 right parenthesis left parenthesis negative straight m plus 5 right parenthesis space greater than space 0  straight m squared space minus space 4 straight m space plus space 4 space plus space 4 straight m space minus space 20 space greater than space 0  straight m squared space minus 16 space greater than space 0  left parenthesis straight m minus 4 right parenthesis left parenthesis straight m plus 4 right parenthesis space greater than space 0

straight m space less than negative 4 atau straight m space greater than space 4

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Pertanyaan serupa

Penyelesaian dari persamaan (x−1)2−16=0 adalah ....

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