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What happens if we fail a subject in masters. How are the grades effected if we complete it in next semester?

I am currently studying master of analytics, 1st semester. After lazy studies of 4 years engineering, I worked for 3 years in an mnc. I couldnt not really cope up as it was hard for me to focus and grasp things. I think i will fail two subjects as i messed up assignments and stuff. I am really interested in this course and i can do well if i focus. Can you tell me how my grades are gonna effect, If i complete these courses in next semesters.?  Can anyone please suggest me something so that my GPA will be fine?