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x² + 21x - 72 → 1 x 72
72
1 x 72
2 x 36
3 x 24
x² + 21x - 72 = 0
x² - 3x + 24x - 72 = 0
x(x - 3) + 24(x - 3) = 0
(x + 24)(x - 3) = 0
Jangan lupa ucapkan terima kasih