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Is it true that 0.2 is a root of the equation $x 2 − 0.4 = 0$ ?

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True

False

answer is B.

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Detailed Solution

Given statement is that 0.2 is a root of the equation

x 2 − 0.4 = 0

.
Now, put the value of

x = 0.2

in the equation, we get,

= 0.2 2 − 0.4 = 0.04 − 0.4 = − 0.36 ≠ 0

Since the given equation is not satisfied, the given statement is false.
The correct statement is,

0.2

is not the root of the equation

x 2 − 0.4 = 0

.
Hence, the correct option is 2.

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