Diket
a = 1, b = (m - 1), c = 9
Agar persamaan kuadrat mempunyai akar-akar real berbeda, maka D > 0 dimana:
D = b² - 4ac
D = (m − 1)² − 4(1)(9)
D = m² − 2m + 1 − 36
D = m² − 2m − 35
m² - 2m − 35 > 0
(m + 5) (m − 7) > 0
maka,
m < −5 atau m > 7
semoga membantu
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Diket
a = 1, b = (m - 1), c = 9
Agar persamaan kuadrat mempunyai akar-akar real berbeda, maka D > 0 dimana:
D = b² - 4ac
D = (m − 1)² − 4(1)(9)
D = m² − 2m + 1 − 36
D = m² − 2m − 35
m² - 2m − 35 > 0
(m + 5) (m − 7) > 0
maka,
m < −5 atau m > 7
semoga membantu