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    Please help. I need to find the B term so I did comparing coffcients for it. So that's 12=B but that's not right

    SeanFM Math 123 Maths (2x2) Life
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    Michiyo
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    (Original post by Jane122)
    Michiyo
    Where is the working for B? Which coefficients are you comparing to 12x?
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    (Original post by Muttley79)
    Where is the working for B? Which coefficients are you comparing to 12x?
    I can Only compare the x terms to B and that's B therefore B=12
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    (Original post by Jane122)
    I can Only compare the x terms to B and that's B therefore B=12
    Check the LHS again ... you have a pair of brackets there.
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    4a + b =12
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    (Original post by Muttley79)
    Checj the LHS again ... you have a pair of brackets there.
    But I can't use that can I? It would have an x^2 term in it
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    (Original post by Hamzah249)
    4a + b =12
    Where's the 4a from?
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    You're comparing the coefficients wrong. You can't simply compare A as the coefficient of the x to the power 2!

    Try again but completely open all the brackets and expand the equation then compare the coefficients. Hope this helps 😊
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    (Original post by Hamzah249)
    ....
    Read the posting rules please
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    (Original post by Jane122)
    Where's the 4a from?
    simplify A(x+2)(x+2) and you will see that it's not just B thats the coefficient of x.

    Also a tip, if comparing coefficients seems a bit confusing, you can always take any value of x to find the final constant. Take value such as x=1 or 2.
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    (Original post by Jane122)
    Where's the 4a from?
    There are x terms when you expand the brackets on the LHS
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    (Original post by Student1256)
    You're comparing the coefficients wrong. You can't simply compare A as the coefficient of the x to the power 2!

    Try again but completely open all the brackets and expand the equation then compare the coefficients. Hope this helps 😊
    I never compared A , I already know you can't do that cause it's to the power of 2. So no , you didn't help.
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    (Original post by Muttley79)
    Read the posting rules please
    I guess I should have only asked him to simplify A(x+2)(x+2)
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    (Original post by Hamzah249)
    simplify A(x+2)(x+2) and you will see that it's not just B thats the coefficient of x.

    Also a tip, if comparing coefficients seems a bit confusing, you can always take any value of x to find the final constant. Take value such as x=1 or 2.
    A better choice is usually x = 0.

    Please read the guidelines before posting again in the Maths forum
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    (Original post by Hamzah249)
    simplify A(x+2)(x+2) and you will see that it's not just B thats the coefficient of x.

    Also a tip, if comparing coefficients seems a bit confusing, you can always take any value of x to find the final constant. Take value such as x=1 or 2.
    I swear nobody on this thread bothered to look AT THE PIC. I've done substituting already and I need to do comparing coefficients to find the B term cause you can't do substation. Also, would it be 2A then? Not 4a?
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    (Original post by Jane122)
    I never compared A , I already know you can't do that cause it's to the power of 2. So no , you didn't help.
    Have you found your error yet?
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    (Original post by Jane122)
    I swear nobody on this thread bothered to look AT THE PIC. I've done substituting already and I need to do comparing coefficients to find the B term cause you can't do substation. Also, would it be 2A then? Not 4a?
    I don't know why you are getting all worked up on those trying to help you, we did look at the picture maybe you need to read what we said?
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    (Original post by Muttley79)
    Have you found your error yet?
    No, nobody is helping I don't understand
 
 
 
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