Solve x² - 2x - 15

Problem

$x^2 - 2x - 15$

Step-by-step solution

Find two numbers multiplying to $-15$ and adding to $-2$ .
Try $(-5, 3)$ : $(-5)(3) = -15$ ✓, $-5 + 3 = -2$ ✓.
Result: $(x - 5)(x + 3)$ .

Answer

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

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