GCSE Maths- surds homework, somebody pls help me
Hey, I'm stuck on my maths homework. The question is:
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
Try dividing up the 18 so you're left with 2 by itself.
Original post by RachelChoy11
Hey, I'm stuck on my maths homework. The question is:
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
think this is how you do it:
2 root 18 x 3 root 2
2 root 9x2 x 3 root 2
2x3 root 2 x 3 root 2
6 root 2 x 3 root 2
18 root 2
Root 18 can be written as root 2 x root 9
Root 9 is 3 so root 18 ends up simplified to 2 x (3 x root 2)
So you have 2 x 3 x root 2 x 3 x root 2
So 2x3x3=18
Root 2 x root 2 is 2 so
18x2=36
I think anyway, if that makes sense
Posted from TSR Mobile
Root 9 is 3 so root 18 ends up simplified to 2 x (3 x root 2)
So you have 2 x 3 x root 2 x 3 x root 2
So 2x3x3=18
Root 2 x root 2 is 2 so
18x2=36
I think anyway, if that makes sense
Posted from TSR Mobile
Original post by bookworm246love
think this is how you do it:
2 root 18 x 3 root 2
2 root 9x2 x 3 root 2
2x3 root 2 x 3 root 2
6 root 2 x 3 root 2
18 root 2
2 root 18 x 3 root 2
2 root 9x2 x 3 root 2
2x3 root 2 x 3 root 2
6 root 2 x 3 root 2
18 root 2
Giving full solutions is generally frowned upon. In any case, that's incorrect.
Original post by HandmadeTurnip
Giving full solutions is generally frowned upon. In any case, that's incorrect.
opps
Original post by RachelChoy11
Hey, I'm stuck on my maths homework. The question is:
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
Simplify: 2 root 18 x 3 root 2. Can somebody run through this one with me so I can do the rest of them please? Thanks.
2 root 18 x 3 root(2)=
2 root(2 x 9) x 3 root(2)=
3 x 2 root(2) x 3 root(2)=
6 root(2) x 3 root(2)=
18 x 2=
36
(edited 9 years ago)
Why do people keep giving incorrect solutions.
OP, see jared777's post for the correct method.
OP, see jared777's post for the correct method.
Original post by VonDoom
2 root 18 x 3 root(2)=
2 root(2 x 9) x 3 root(2)=
3 x 2 root(2) x 3 root(2)=
6 root(2) x 3 root(2)
wat do at dis point
2 root(2 x 9) x 3 root(2)=
3 x 2 root(2) x 3 root(2)=
6 root(2) x 3 root(2)
wat do at dis point
From there you've got
6xroot(2)x3xroot(2) = 6x3xroot(2)xroot(2) =
18x2=36
Posted from TSR Mobile
Original post by VonDoom
2 root 18 x 3 root(2)=
2 root(2 x 9) x 3 root(2)=
3 x 2 root(2) x 3 root(2)=
6 root(2) x 3 root(2)=
18 x 2=
36
2 root(2 x 9) x 3 root(2)=
3 x 2 root(2) x 3 root(2)=
6 root(2) x 3 root(2)=
18 x 2=
36
Yeah I also got this. I realised that I double 18, and wrote 32... I'm such a noob. Thanks.
Original post by RachelChoy11
Yeah I also got this. I realised that I double 18, and wrote 32... I'm such a noob. Thanks.
Haha, it's alright
Posted from TSR Mobile
http://www.thestudentroom.co.uk/showthread.php?t=2865315
someone pls help me with this one too. I'm supposed to get an A* at the end of this year... Not going to happen :L
someone pls help me with this one too. I'm supposed to get an A* at the end of this year... Not going to happen :L
Original post by RachelChoy11
http://www.thestudentroom.co.uk/showthread.php?t=2865315
someone pls help me with this one too. I'm supposed to get an A* at the end of this year... Not going to happen :L
someone pls help me with this one too. I'm supposed to get an A* at the end of this year... Not going to happen :L
You won't get an A*, you will get an A.
Quick Reply
Related discussions
- GCSE Diary
- Can I study maths without a level maths?
- GCSE maths
- The Hard Grade 9 Questions Thread 2019
- chemsheets molecular substances GCSE 1066
- GCSE math to A level
- worried about a-level choices
- Hi I need help with this maths question pls
- Calculator Problems Again…
- The most difficult topic in GCSE maths
- the ultimate grow your grades GCSE 💗
- english language - how to improve fast
- maths
- GCSE Maths (H) - Edexcel
- GCSE Exam Discussions 2024
- Physics A-Level
- 2022 Edexcel Maths GCSE (Higher) Checklist
- GCSE advice for all 9s
- I have a lot OF A-level and GCSE Maths and Further Maths resources. Who's Interested?
- What Computer Science revision resources are there Online?
Latest
Posted 4 minutes ago
Dissertation survey https://forms.gle/GUYmoXv6ssRJumjH7Last reply 4 minutes ago
Official UCL Offer Holders Thread for 2024 entryLast reply 7 minutes ago
Official University College London Applicant Thread for 2024Last reply 11 minutes ago
Student Finance applications for Part Time studentsLast reply 12 minutes ago
Amazon Project management apprenticeship 2024Last reply 12 minutes ago
LSE Economic history departmentLast reply 16 minutes ago
Sevenoaks vs Godolphin and LatymerLast reply 17 minutes ago
BA (hons) Philosophy at University of London/OU student finance queryLast reply 19 minutes ago
Can anyone Manchester think of any green spaces less likely to be dogsLast reply 19 minutes ago
My boyfriend left me because he said my breasts and butt were too smallTrending
Last reply 15 hours ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 15 hours ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
