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kelsey1 Group Title

f(x)=-x^2+5x+7 Find f(3a-4)

  • one year ago
  • one year ago

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  1. tacamry Group Title
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    so wat am pose to be doing?

    • one year ago
  2. Stephchen Group Title
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    substitute 3a-4 to all the x in the equation

    • one year ago
  3. kelsey1 Group Title
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    yes I know, but I'm not sure how to do that like can you show me the steps

    • one year ago
  4. Hero Group Title
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    f(x)=-x^2+5x+7 f(3a-4) = -(3a-4)^2 + 5(3a -4) + 7 Simplify the expression

    • one year ago
  5. Stephchen Group Title
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    |dw:1354855276611:dw| For the first term

    • one year ago
  6. Hero Group Title
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    Bro, the first term is negative

    • one year ago
  7. Stephchen Group Title
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    However there is a negative sign in fron of x so you have to multiply the first term with negative one.

    • one year ago
  8. Stephchen Group Title
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    Hero buddy, patience... lol

    • one year ago
  9. Hero Group Title
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    But anyway, the difficult part is done. Let the person finish it themselves.

    • one year ago
  10. Stephchen Group Title
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    I assume you'll have the idea to do the next ones from here on?

    • one year ago
  11. kelsey1 Group Title
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    I know how to do foil and all the math yet are you solving for x or leaving it as a quadratic?

    • one year ago
  12. Hero Group Title
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    Nothing nowhere says to solve for x. In fact, when I posted the hint I gave you. I left a comment below saying to "simplify the expression". How did you interpret "solve for x" from that?

    • one year ago
  13. Stephchen Group Title
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    x becomes a, so x is out of the picture. if your asked to simplify the expression then I guess all you have to do is the equation hero did setup for you.

    • one year ago
  14. Stephchen Group Title
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    you're*

    • one year ago
  15. kelsey1 Group Title
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    Well I meant "a" and my problem was that I thought I was solving for "a".

    • one year ago
  16. Stephchen Group Title
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    then I guess you're all set :)

    • one year ago
  17. Hero Group Title
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    @kelsey1, will you please just simplify the expression and let us know what you get?

    • one year ago
  18. kelsey1 Group Title
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    9a^2-9a+3

    • one year ago
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