Solve x² - 2x - 15 = (x - 5)(x + 3)

Problem

$x^2 - 2x - 15$

Step-by-step solution

Carilah dua bilangan yang hasil kalinya $-15$ dan jumlahnya $-2$ .
Coba $(-5, 3)$ : $(-5)(3) = -15$ ✓, $-5 + 3 = -2$ ✓.
Hasil: $(x - 5)(x + 3)$ .

Answer

$(x - 5)(x + 3)$

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