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anonymous

  • one year ago

If g(x) = x^2 - 2x, find g(4n)

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  1. anonymous
    • one year ago
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    @jim_thompson5910

  2. jim_thompson5910
    • one year ago
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    |dw:1438040736722:dw|

  3. jim_thompson5910
    • one year ago
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    Replace every x on the right side with (x) basically enclose the x terms in parenthesis |dw:1438040784609:dw|

  4. jim_thompson5910
    • one year ago
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    Then replace every 'x' with '4n' |dw:1438040809741:dw|

  5. jim_thompson5910
    • one year ago
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    |dw:1438040835070:dw|

  6. jim_thompson5910
    • one year ago
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    I'll let you simplify

  7. anonymous
    • one year ago
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    so 16n^2-8n?

  8. jim_thompson5910
    • one year ago
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    you are correct

  9. anonymous
    • one year ago
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    can you look at one more?

  10. jim_thompson5910
    • one year ago
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    sure

  11. anonymous
    • one year ago
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    The ordered pairs (0, 1), (3, 2), (3, -5), and (5, 4) are on the graph of a relation between x and y. Which of the following statements is true. x is a function of y. y is a function of x.

  12. jim_thompson5910
    • one year ago
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    Do any of the points have repeated x values?

  13. anonymous
    • one year ago
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    yea (3,2) and (3, -5), so its not a function

  14. jim_thompson5910
    • one year ago
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    specifically y is not a function of x

  15. jim_thompson5910
    • one year ago
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    if we plug in x = 3, we don't know what will come out. The rule is that exactly one output must come out for any given input

  16. anonymous
    • one year ago
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    thanks!

  17. jim_thompson5910
    • one year ago
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    you're welcome

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