Turn on thread page Beta
    Offline

    21
    OP listen to the others. I only replied because no one else was, but others are now.
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    18
    ReputationRep:
    (Original post by starfab)
    They are correct, no?
    No, 1d should be -8x not +2x and 4a should be +2 not +3..
    Online

    19
    ReputationRep:
    1d, 4a, 4b and 4c are incorrect.
    for 1d, check your signs
    for 4a, i think you've added something up incorrectly
    for 4b, you got to w^2 - 3w - 3w + 9, which is correct, but you collected your terms incorrectly.
    for 4c, check your signs
    and for 5 in general, you don't need the 1 in front of x, e.g. 1x is written as x
    • Thread Starter
    Offline

    8
    ReputationRep:
    (Original post by Stevo F)
    And retry 1d and 4a
    (Original post by 4Kaylum)
    1d incorrect - check your pluses and minuses again: `-3x + 2y - 5x + 7y`.

    4a, 4b, and 4c are also incorrect, so I recommend you work on your multiplying out brackets. I recommend using a grid for it - I'll attach an image of what I mean (if I work out how to, I literally just made an account).
    Attachment 730060

    All of 2 and 5 look correct, though, so you're doing pretty well on that front c:
    (Original post by justinawe)
    1(d), 4(a), 4(b), 4(c) are incorrect
    (Original post by starfab)
    Recheck these OP. when - × - then it changes to +.
    Are the answers: 1d) 8x+9y 4a) y2 + 3y + 2 4b) w2 + 6w + 9 4c) 7p - 1
    Offline

    1
    ReputationRep:
    (Original post by Maths_English)
    Are the answers: 1d) 8x+9y 4a) y2 + 3y + 2 4b) w2 + 6w + 9 4c) 7p - 1
    1d is wrong again - right numbers but wrong signs.
    4a is right, 4b needs the signs checking but you have the right numbers, and you need to check over how you did 4c again (you're getting there but you've not quite got it yet).
    • Thread Starter
    Offline

    8
    ReputationRep:
    (Original post by 4Kaylum)
    1d is wrong again - right numbers but wrong signs.
    4a is right, 4b needs the signs checking but you have the right numbers, and you need to check over how you did 4c again (you're getting there but you've not quite got it yet).
    1 d) -8x + 9y
    4 b) w2 - 6w + 2
    4 c) This is how I did it

    (2p + 1) (3p - 1)
    6p - 2p + 3p - 1
    6p - 2p = 4p 4p + 3p = 7p
    7p - 1
    Offline

    1
    ReputationRep:
    Correct and correct for 1d and 4b!

    4c is missing a squared when you multiply `2p` and `3p`.
    • Thread Starter
    Offline

    8
    ReputationRep:
    (Original post by 4Kaylum)
    Correct and correct for 1d and 4b!

    4c is missing a squared when you multiply `2p` and `3p`.
    Ah I see because both contain p

    6p2 + 1p - 1
    Offline

    1
    ReputationRep:
    (Original post by Maths_English)
    6p2 + 1p - 1
    Yeah, there you go!
    • Thread Starter
    Offline

    8
    ReputationRep:
    (Original post by 4Kaylum)
    Yeah, there you go!
    So with the answers now corrected, is everything right?
    Offline

    9
    ReputationRep:
    (Original post by Maths_English)


    1) a) 3a b) 8d c) 6x+2y d) 2x+9y
    2) a) d5 b) 16ef c) g9 d) h7
    3) a) 2a + 6 b) 6u - 15 c) 3x2 + 2x d) 4b2 -6b
    4) a) y2 + 3y + 3 b) 6w4 - 9 c) 6p2 - 5p - 1 d) q2 - 1
    5) a) 2(2 - 5x) b) 2(3x + 1y) c) -4(1x + 2) d) 2a(5 + 4a) e) 3b(3b - 1c)
    Answer for 4a is (y^2 +3y+2)
    4b : w^2-6w+9
    4c: 6p^2+p-1
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 9, 2018

3,086

students online now

800,000+

Exam discussions

Find your exam discussion here

Poll
Should predicted grades be removed from the uni application process
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.