Two video lessons are available on this topic with lesson notes, exercises and solutions. The first covers the easier equations with a single x2 term and the second covers equations with a multiple x2 term as well as the difference of two squares factorisation which we will do next lesson.
Higher Tier Grade Boundaries (out of 240 possible marks):
Sitting
Grade 9
Grade 8
Grade 7
Grade 6
Grade 5
Grade 4
Grade 3
Jun 2017
190
157
124
96
68
41
27
Nov 2017
189
150
112
85
58
32
19
Jun 2018
202
170
139
109
79
50
35
Nov 2018
194
159
125
95
66
37
22
Jun 2019
198
167
137
108
80
52
38
Nov 2019
197
165
133
103
73
43
28
Nov 2020
189
157
126
96
66
37
22
Average %
81%
67%
53%
41%
29%
17%
11%
These are the higher tier grade boundaries for all past sittings of the new Edexcel GCSE Maths. The first two sets of exams were not at all popular with students but the June 2018 exams were viewed as more reasonable. The grade boundaries were higher but students felt they had more opportunity to demonstrate their skills and knowledge. Grade boundaries for November exams are not as reliable as boundaries for June exams because there are far fewer students taking what essentially are re-sit exams.
All except the November 2020 exams were taken before the pandemic but give an indication of what you can expect both when completing past papers and when sitting your actual GCSE exams in May/June 2023.
Below is the density worksheet from which you attempted several questions in class.
As part of your revision I suggest you try a few more questions - some of them require volume formulae you have not yet met but most are suitable now. The solutiions to the worksheet are also uploaded below.