Explicație pas cu pas:
P(X) = X² - 2X - 15 = X² + 3X - 5X - 15 = X(X + 3) - 5(X + 3) = (X + 3)(X - 5)
X = -3
X = 5
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Explicație pas cu pas:
P(X) = X² - 2X - 15 = X² + 3X - 5X - 15 = X(X + 3) - 5(X + 3) = (X + 3)(X - 5)
X = -3
X = 5