IGCSE Mathematics January 2019 - 4MA1/1HR

IGCSE Mathematics January 2019 - 4MA1/1HR

Contents:
00:00 - Intro
00:10 - Question 1
00:42 - Question 2
01:35 - Question 3
02:53 - Question 4
03:46 - Question 5
04:20 - Question 6
05:10 - Question 7
06:00 - Question 8
07:04 - Question 9
09:43 - Question 10
10:55 - Question 11
12:14 - Question 12
14:07 - Question 13
16:27 - Question 14
18:30 - Question 15
20:26 - Question 16
23:08 - Question 17
25:44 - Question 18
27:14 - Question 19
29:30 - Question 20
31:43 - Question 21
33:38 - Question 22
36:39 - Question 23

[PuiyuChan-hshw]

hello, for question 22, why is CD = -b+a? thank you

[salmonella]

hello! for question 21 why did you take z instead of 5 when substituting the values into the formula?

[emma]

I have a question about number 20. Why do we let 2x be the side of the cube?? Im confused.

[sarahahaz]

Thank you sir for the video you are the best!