Question

only for genius....
can anyone find the error?
right ans is to be brainlist.....

Answer 1

$the \: error \: is \: in \: the \: second \: line.$
$it \: is \: not \: true \: that \: \sqrt{ {x}^{2} } = x$
$but \: rather \: \sqrt{ {x}^{2} } = |x|.$
$for \: x = 4 - \frac{9}{2} < 0 \\ \: you \: need \: to \: keep \: track \: of \: the \: extra \: minus \: sign \: coming \: from \: the \: absolute \: value.$

Answer 2

Answer:

ipHi there !

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Given : 2 + 2 = 4 .............(1)

To prove : 2 + 2 = 5  

Proof :  

We can say that..  

20 - 20 = 25 - 25

[Because both equals to 0]

20 - 20 = 25 - 25  

5 × 4 - 5 × 4 = 5 × 5 - 5 × 5

4 ( 5 - 5 ) = 5 ( 5 - 5)  

On cancelling [ 5 - 5 ] both sides..

 ∴ 4 = 5  

Now,  

As we have proved above : 4 = 5  

We can substitute value in equation (1)  

2 + 2 = 4 [ Given ]  

=> 2 + 2 = 5 [ 4 = 5 ]

Hence,  

It is proved that 2 + 2 = 5

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Now, coming to the mistakes that we have done above, because it is universal truth that

 [ 2 + 2 = 4 ]  

So, in the above solution we can't cancel  5 - 5 both sides  because both the sides , there are different numbers multiplied.

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Hope you are satisfied.

Thanks for the question!

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