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Math Help - Need to impress my dad(Who's a math teacher)

  1. #1
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    Need to impress my dad(Who's a math teacher)

    Someone please help me work out these problems, I'm supposed to find the zeros of each function.
    f(x)=x^2-7x

    f(x)+x^2-9x+20

    Also how would I complete the square for this expression?

    x^2-15x+?
    Please help I'd appreciate it,have to impress my math teacher of a dad.
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  2. #2
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    Quote Originally Posted by newbies View Post
    Someone please help me work out these problems, I'm supposed to find the zeros of each function.
    f(x)=x^2-7x

    f(x)+x^2-9x+20

    Also how would I complete the square for this expression?

    x^2-15x+?
    Please help I'd appreciate it,have to impress my math teacher of a dad.
    1 factor out the x

    2 try factoring if not quadratic equation

    3 \displaystyle x^2\pm bx+\left(\frac{b}{2}\right)^2=\left(\frac{b}{2}\ri  ght)^2 then \displaystyle\left(x\pm\frac{b}{2}\right)^2=\left(  \frac{b}{2}\right)^2

    4 Ask your dad for help. He will be proud that you are working to have a better understanding of fundamental concepts.
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  3. #3
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    You'd think that but I've been procrastinating lately, and like my Algebra 200 grades been slipping so he basically gave me a book and a list of questions these were the final three questions and I was trynna get them all right,m at least I thought so but asking my dad isn't a option. But cheating isn't either, thanks for the advice, I'll turn it in as is.
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  4. #4
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    Quote Originally Posted by newbies View Post
    [snip] But cheating isn't either, thanks for the advice, I'll turn it in as is.
    Good. Because MHF is not a service for providing answers that are intended to impress other people and are a substitute for lack of effort.

    Thread closed.
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