Maths

Explanation of lesson for those who had competition:

Page 35 Lecture Notes

Example 10

a) x^2+11x-15

=x^2+11x+(11/2)^2-(11/2)^2-15

=(x+5.5)^2-30 and 1/4 -15

=(x+5.5)^2-45 and 1/4

b) Hence,

X^2+11x-15=0

(x+5.5)^2-45 and 1/4=0

(x+5.5)^2=45 and 1/4

x=1.23 or x=-12.22

Homework for maths

Maths quiz 2 (do behind quiz 1)

a) Express x^2+6x-27 in the form of (x+a)^2+b

b) Hence find x^2+6x-27=0

Do questions 10, 11 and 12 of the unit 2.2 worksheet and tier b, question 2 and tier c, question 1 of page 43 in the lecture notes on the same foolscap paper with the weekend homework

(Due tomorrow)

Geography

Download unit 1.2 of ejournal

Find videos or pictures about the first part on speed

Type out 2 more variables in speed (course or river and wind direction), explain it and find videos or pictures for it

(Due Friday, 15/2/13)

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