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Whizbang's Workshop Set Cards List & Guide
simple, really :)
let's just say that: a=b
multiply both sides by a. so you get: a²=ab
substract both sides by b², so: a²-b²=ab-b²
which you can also write as: (a+b)*(a-b)=b*(a-b)
now you can divide both sides by (a-b), which in term cancel each other on both sides
what you have left is: a+b=b
but since a is equal to b, you can also write as: b+b=b or 2b=b
divide by b, so: 2=1
q.e.d.
Quote from AntonydusWurm >> let's just say that: a=b now you can divide both sides by (a-b), which in term cancel each other on both sides
No, it means that a+b-b=0
So, a=0 and, because a=b, so also b=0
You can't divide something by something without even excluding that it may be zero: that's equations 101
Rank 25 Math
No, the real issue is that he divides by zero when he cancels out (a-b), since that quantity is equal to zero.
You divided both sides by (a-b) and a=b so you divided both sides by 0
Yes, undefined equals undefined you're a genius
Why stop at 2? You can also add b to both sides before dividing by b and prove that 2=3... But yeah you can't simply divide by stuff without proving that what you divide by is not zero.
I am envoy from nowhere in nowhere. Nobody and nothing have sent me. And though it is impossible I exist. ©Trimutius
Nani?
this is why hearthstone added ranks before 25
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simple, really :)
let's just say that: a=b
multiply both sides by a. so you get: a²=ab
substract both sides by b², so: a²-b²=ab-b²
which you can also write as: (a+b)*(a-b)=b*(a-b)
now you can divide both sides by (a-b), which in term cancel each other on both sides
what you have left is: a+b=b
but since a is equal to b, you can also write as: b+b=b or 2b=b
divide by b, so: 2=1
q.e.d.
No, it means that a+b-b=0
So, a=0 and, because a=b, so also b=0
You can't divide something by something without even excluding that it may be zero: that's equations 101
Rank 25 Math
No, the real issue is that he divides by zero when he cancels out (a-b), since that quantity is equal to zero.
You divided both sides by (a-b) and a=b so you divided both sides by 0
Yes, undefined equals undefined you're a genius
Why stop at 2? You can also add b to both sides before dividing by b and prove that 2=3... But yeah you can't simply divide by stuff without proving that what you divide by is not zero.
I am envoy from nowhere in nowhere. Nobody and nothing have sent me. And though it is impossible I exist. ©Trimutius
Nani?
this is why hearthstone added ranks before 25