Question

I have a problem here.....
a=b
a^2=ab
a^2 - b^2=ab-b^2
(a+b)(a-b)=a(a-b)
a+b=a
2a=a
2=1
Which step is wrong?

Answer 1

third line, i think.

Answer 2

definitely third

Answer 3

you can subtract a common term from both sides of the equation

Answer 4

no second is fine mutiplying both sides with a is possible

Answer 5

no my bad,it's the step 4 to five,you cant eliminate a-b since a=b

Answer 6

it's the same thing to divide it by zero

Answer 7

^exactly

Answer 8

yes..what about 4 * 0 = 9* 0 and we have 4=9 !! voila!

Answer 9

Thanks.....GUYS

Answer 10

I have got it.....

Answer 11

note carefully:-
A CRAZY QUESTION.

Answer 12

but a good one:)

Answer 13

Why do u think its crazy.......?@maheshmeghwal9

Answer 14

since 2=1.
it makes whole math wrong:/

Answer 15

@TareKKowshiK one more thing

Answer 16

(a+b)(a-b)=a(a-b)
a+b=a
it shouldn't be since (a-b)=0.