If (x²- 4) = (x + 2) = x - 2, which polynomial should fill in the blank below? (x + 2)x= x² - 4
O x² – 4
OX-2
O x + 2
O x²-2

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?