Roboguru

Akar-akar persamaan kuadrat 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

Pembahasan Soal:

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

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 22 Desember 2020

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