alleryA cubic is x³ − 7x + 6. Which is its complete factorisation?
A(x−1)(x−2)(x+3)
B(x+1)(x−2)(x−3)
C(x−1)(x+1)(x−6)
D(x−2)(x+1)(x+3)
Answer & Solution
Correct answer: A. (x−1)(x−2)(x+3)
The roots 1, 2, and −3 give factors (x−1)(x−2)(x+3).
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