Jawab:
Kuadrat sempurna
Penjelasan dengan langkah-langkah:
x² - 2x - 15= 0
x² -2x + 1 - 16 = 0
(x² - 2x + 1) = 16
(x - 1)² = 16
x- 1 = ± √16
x - 1 = 4 atau x - 1 = - 4
x = 5 atau x = - 3
x² - 2x - 15 = 0
(x + 3) (x - 5) = 0
x1 = - 3 dan x2 = 5
HP { -3, 5 }
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Jawab:
Kuadrat sempurna
Penjelasan dengan langkah-langkah:
x² - 2x - 15= 0
x² -2x + 1 - 16 = 0
(x² - 2x + 1) = 16
(x - 1)² = 16
x- 1 = ± √16
x - 1 = 4 atau x - 1 = - 4
x = 5 atau x = - 3
x² - 2x - 15 = 0
(x + 3) (x - 5) = 0
x1 = - 3 dan x2 = 5
HP { -3, 5 }