IGCSE Mathematics January 2020 - 4MA1/2HR

IGCSE Mathematics January 2020 - 4MA1/2HR

Contents:
00:00 - Intro
00:10 - Question 1
01:01 - Question 2
02:21 - Question 3
03:04 - Question 4
03:37 - Question 5
04:30 - Question 6
05:07 - Question 7
05:58 - Question 8
06:40 - Question 9
07:37 - Question 10
09:21 - Question 11
10:47 - Question 12
12:37 - Question 13
13:49 - Question 14
15:19 - Question 15
16:36 - Question 16
19:17 - Question 17
22:08 - Question 18
22:52 - Question 19
24:53 - Question 20
26:29 - Question 21
28:51 - Question 22
30:37 - Question 23
32:14 - Question 24
35:13 - Question 25
36:49 - Question 26

[leclerc_]

Hi, i have a doubt for q24. How can you find the area of the triangle using 1/2bh if it isn't a right-angle triangle? Are you assuming that it is?

[urmyfavpersontbh]

Hi there, I don't understand why do you time -3 with 10? where did it come from? (q.19)

[Regulusdeservedbetter]

26:09 could you please explain where you got the 250 from?

[sunethrajayawardena]

Y didn't u even draw a diagram in the last question

[Hnn_aa]

In 21, how did u factorise soon, is there a method in that, an easy method

[ryu]

On the last question what is "mew" or "new" you were saying, and what is the symbol called?

[fahm]

at 39:52 why did u divide by 2? in question 26

[CosmicPlayzz]

hi in question 24 i solved everything the same until i reached the triangle part i wasnt sure how to get area because the triangle isn't right angled so i wasnt sure how to find, how were you able to know that this is a right angle triangle?

[seanlau]

in 26:55 questiion 21 how do you factorise the 10x^2+23x+12