What is the negation of 'There exists an xxx such that x2=2x^2 = 2x2=2'?
For all xxx, x2=2x^2 = 2x2=2
For all xxx, x2≠2x^2 \neq 2x2=2
There exists an xxx such that x2≠2x^2 \neq 2x2=2
There exists an xxx such that x2=−2x^2 = -2x2=−2