Term 1 Week 6 (Tues) 3E3 AMaths - Symmetric Properties of Roots

Recapped the basic structure to construct the new quadratic equation based on new roots. Corrected their common mistake that x^2 + (sum of roots)x + product of roots = 0 is incorrect. Students tend to use '+' throughout the expression. Class also weak in application of their algebraic formula when solving problem involving symmetric properties of roots. Got to explicitly show them the formula and asked the class to do comparsion with alpha and beta. About 60% of the students were able to grasp the concept when I illustrated with quadratic graphs, emphasising on the location of the roots of the equation and relating back to alpha and beta. Will be meeting some students on Monday 4-5pm to help out the weaker ones. It is quite difficult these days to arrange for additional informal remedial before 4pm as most students have either CCA or SRP.