How come Good and Evil fruit brought from same tree of knowledge in the garden of Eden?

GOD's words will never change from the beginning of creation and forever. If we read in Mathew chapter 7 words 17-18 it says: >17) Every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. >18) A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. I need to understand how this tree of knowledge bringeth forth GOOD and EVIL fruit which Adam and Eve eat.