**Math Equation Riddle - 9 May**

Find the mistake in the below maths equations

A = 2

A(A-1) = 2(A-1)

A2-A = 2A-2

A2-2A = A-2

A(A-2) = A-2

A = 1

**For Solution :**Click Here

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Find the mistake in the below maths equations

A = 2

A(A-1) = 2(A-1)

A2-A = 2A-2

A2-2A = A-2

A(A-2) = A-2

A = 1

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After

ReplyDeleteA(A-2)=A-2

next step should be

A(A-2)-A+2=0

And then

A^2-3A+2=0

now solve this equation A , answer will be 1 and 2

To get from A(A-2) =A-2 to A=1 you divided by zero. 0/0 does not equal 1.

ReplyDeleteya . we cannot divide by zero.

Deletenothing wrong in those equations...

ReplyDeletethat was perfectly correct:)

A-2=0, as A is taken as 2, it cannot be cancelled...

ReplyDeleteLogic:

ReplyDeleteA-2 = 0 so we can not divide by 0 in line 5

A(A-2)=A-2 to reach the step after this we cannot divide both sides by 0.

ReplyDeleteAs A-2=0, we can not divide LHS and RHS by A-2.....

ReplyDeleteSo the logic is wrong....

A = 2

ReplyDeleteA(A-1) = 2(A-1)

This sentence is wrong

If you multiply something in both sides of an equation IT SHOULD NOT BE ZERO cuz it will be always correct

eg.

1 = 100

1(0) = 100(0)

0 = 0 is correct

thus 1 = 100 is correct