Jawaban:
x² - x - 20 = 0
Penjelasan dengan langkah-langkah:
x1 = -4
x2 = 5
(x - x1) (x - x2) = 0
(x - (-4)) (x - 5) = 0
(x + 4) (x - 5) = 0
x² - 5x + 4x - 20 = 0
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Jawaban:
x² - x - 20 = 0
Penjelasan dengan langkah-langkah:
x1 = -4
x2 = 5
(x - x1) (x - x2) = 0
(x - (-4)) (x - 5) = 0
(x + 4) (x - 5) = 0
x² - 5x + 4x - 20 = 0
x² - x - 20 = 0