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Question
Solve the following quadratic equations by factorization:
(x − 4) (x + 2) = 0
Solution
We have
(x − 4) (x + 2) = 0
either
⇒ (x − 4) = 0 or (x + 2) = 0
⇒ x = 4 or x = -2
Thus, x = 4 and x = -2 are two roots of the equation (x − 4) (x + 2) = 0
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