ALERT ALERT ALERT.
tips for math. credits; mr lee.
he said,
WRONG (the above ones).
it should be,
x2-y2=(x+y)(x-y)
remember.
and, just in case you all are doing last minute revision,
the chapters to study are 1,2,3,4,7 and 8.
do the ws that has hundred of questions and revise mensuration.
memorise all formulas ar.
last of all, GOODLUCK. :)