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Continuity in an Interval

Which one of ...

Question

Which one of the following is true for absolute term $= 0$ ?

(x + 2) (x - 2 x)

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(x + 1) (x - 1)

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(2 x - 1) (1 + x)

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(x + 3) (x + 1)

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Solution

The correct option is B $(x + 2) (x - 2 x)$
Lets check for option A:
$(x + 2) (x - 2 x)$
$= x^{2} - 2 x^{2} + 2 x - 4 x$
$= - x^{2} - 2 x$
So, the absolute term is $0$ .

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