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P.nut1996

  • one year ago

Help please? Let f(x) =x+7 and g(x) =x–2. What is f(x)•g(x)?

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  1. P.nut1996
    • one year ago
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    \[A. x ^{2}-5x+14\]

  2. P.nut1996
    • one year ago
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    \[B. x ^{2}+5x-14\]

  3. Goten77
    • one year ago
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    |dw:1361917120837:dw|

  4. RD⁴²
    • one year ago
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    If f(x) =x+7 and g(x) =x–2 then f(x)•g(x) = (x+7)(x-2) Do FOIL or box method.

  5. P.nut1996
    • one year ago
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    \[C. x ^{2}+5x-5\]

  6. P.nut1996
    • one year ago
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    \[D. x ^{2}+9x+5\]

  7. RD⁴²
    • one year ago
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    What does (x+7)(x-2) equal?

  8. Goten77
    • one year ago
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    if those are you only multiple choices then just by looking at them we can decide which 1 is the only possible answer.... look at the ending constant

  9. P.nut1996
    • one year ago
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    \[(x+7)(x-2)= x ^{2}-2x+7x-14=x ^{2}+5x-14\]

  10. P.nut1996
    • one year ago
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    I got x^2+5x-14

  11. RD⁴²
    • one year ago
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    Well done!

  12. P.nut1996
    • one year ago
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    Thanks!

  13. radar
    • one year ago
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    Understand "composite" functions. This is more than just FOIL

  14. radar
    • one year ago
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    |dw:1361917642289:dw|

  15. RD⁴²
    • one year ago
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    @radar Read her question again, it asks for f(x)•g(x), not (f o g)(x)

  16. radar
    • one year ago
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    |dw:1361917795737:dw|

  17. radar
    • one year ago
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    OH, since it was such a large "dot" I thought maybe it was "composite" "FOILed again" lol

  18. RD⁴²
    • one year ago
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    haha

  19. radar
    • one year ago
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    Sorry about that @P.nut1996 stick with RD42

  20. P.nut1996
    • one year ago
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    Thank you so much guys! Very helpful! :D

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