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Q.

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


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a

True

b

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