First Read The Passage Then Determine Whether It Is Argument Or Not Argument Write The Premises And Conclusion Separately
1) economics should never have sought to divorce itself from the other social sciences and can advance only in conjunction with them.
2)The discipline of economics has yet to get over its childish passion for mathematics and for purely theoretical and often highly ideological speculation
3) Economists are all too often preoccupied with petty mathematical problems of interest only to themselves .
A syllogism is an instance of a form of reasoning in which a conclusion is drawn from two given or assumed propositions (premises); a common or middle term is present in the two premises but not in the conclusion, which may be invalid (e.g. all dogs are animals; all animals have four legs; therefore all dogs have four legs ).
https://en.wikipedia.org/wiki/Syllogism