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Math Help - hi everyone, i have an assignment due and i really need help

  1. #1
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    hi everyone, i have an assignment due and i really need help

    i'm stuck on this problem.
    i used the ac theory like this

    14x^2 -20x +6

    a=14 b= -20 c=6

    ac=14(6)=48
    b= -20

    there are no two numbers that will multiply together and get 48 and at the same time be added together to get -20

    i also tried to just factor by using 2 to get 7x^2 - 10x +3 and i ran into the same problem.

    can someone please help me?
    Last edited by CaptainBlack; June 28th 2007 at 02:27 PM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by beautiful View Post
    i'm stuck on this problem.
    i used the ac theory like this

    14x^2 -20x +6

    a=14 b= -20 c=6

    ac=14(6)=48
    b= -20

    there are no two numbers that will multiply together and get 48 and at the same time be added together to get -20

    i also tried to just factor by using 2 to get 7x^2 - 10x +3 and i ran into the same problem.

    can someone please help me?
    7x^2 - 10x +3 = (x - 1)(7x - 3)

    RonL
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  3. #3
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    earboth's Avatar
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    Quote Originally Posted by beautiful View Post
    ...
    ac=14(6)=48
    b= -20
    Hello,

    maybe this helps a little bit further:

    a*c = 14*6 = 84
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  4. #4
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    Hello, beautiful!

    i'm stuck on this problem.

    i used the ac theory like this: . 14x^2 -20x +6

    . . a=14,\:b= -20,\:c=6

    . . ac\:=\:14(6)\:=\:48 . . Here! . 14 6 = 84
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  5. #5
    Math Engineering Student
    Krizalid's Avatar
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    Quote Originally Posted by beautiful View Post
    14x^2-20x+6
    \begin{aligned}14x^2-20x+6&=14x^2-(14x+6x)+6\\&=(14x^2-14x)-(6x-6)\\&=(x-1)(14x-6)\end{aligned}
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