Explicație pas cu pas:
a)
P(X) = X² - 4X + 3 = X² - X - 3X + 3 = X(X - 1) - 3(X - 1) = (X - 1)(X - 3)
X = 1
X = 3
c)
P(X) = X² + 2X - 15 = X² + 5X - 3X - 15 = X(X + 5) - 3(X + 5) = (X + 5)(X - 3)
X = -5
e)
P(X) = X³ - 4X = X(X² - 4) = X(X + 2)(X - 2)
X = -2
X = 0
X = 2
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Explicație pas cu pas:
a)
P(X) = X² - 4X + 3 = X² - X - 3X + 3 = X(X - 1) - 3(X - 1) = (X - 1)(X - 3)
X = 1
X = 3
c)
P(X) = X² + 2X - 15 = X² + 5X - 3X - 15 = X(X + 5) - 3(X + 5) = (X + 5)(X - 3)
X = -5
X = 3
e)
P(X) = X³ - 4X = X(X² - 4) = X(X + 2)(X - 2)
X = -2
X = 0
X = 2