LINEAR EQUATION :
Problem Set upto Q. No. 4: https://youtu.be/txnukRFjzOA
QUADRATIC EQUATION:
PRACTICE SET 2.6 PART TWO UPTO LAST SUM: https://youtu.be/2ORAxOrdmvI
PROBLEM SET 2 UPTO SUM NO. 7: https://youtu.be/DdZx2hoJMek
ARITHMETIC PROGRESSION:
FINANCIAL PLANNING: