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Zactly.
The quotient of division by zero is "undefnined" -it is an impossible number.
The square root of -1 is also "undefined" - it is also an impossible number.
And yet i is taught in algrebra and pre-calc everywhere.
0/(a-b) isnt division by 0, its division by (a-b). Not sure wht that's so hard to understand.
Because it's a shoddy erroneous way to proclaim that 1+1 does not equal 2.