(i) Identify the error(s) and describe what's wrong.
(ii) What is the correct answer?
Post-Lessson elaboration
As discussed in the lesson, the errors in the above working:
- Line 1: Error in first 2 terms - Should not be (2 x 3)^2; similarly, should not be (3 x 2)^2
- Line 1: While the substitution of the 3rd term is correct, should insert () for "-1". This applies to how "-1" was written in lines 2 & 3.
The suggested worked solution:
No comments:
Post a Comment
Note: only a member of this blog may post a comment.