What value/s can x take in the expression k(x - 10) (x + 10) =0 where k is any real number.

Depends on value of k

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10, -10

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100, -100

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Infinitely many

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Solution

The correct option is B
10, -10

This is a quadratic equation. No matter what real number k is,

K(x - 10) (x + 10) = 0

⇒ x = -10, +10

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