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anonymous

  • 5 years ago

Calculate the value of the expression - x^2 + 2 x given that x = 3.13.

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  1. anonymous
    • 5 years ago
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    Is it \[-x^2+2x\]or\[x^2+2x\]?

  2. anonymous
    • 5 years ago
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    just substitute and you'll get approximately-3.5369

  3. anonymous
    • 5 years ago
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    In either case, you substitute 3.13 for x:\[(3.13)^2+2(3.13)=16.0569\]

  4. anonymous
    • 5 years ago
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    for the positive case

  5. anonymous
    • 5 years ago
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    I think she meant the first one loki :)

  6. anonymous
    • 5 years ago
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    yeah, i think you're right

  7. anonymous
    • 5 years ago
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    there is a minus infront

  8. anonymous
    • 5 years ago
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    you just sub. 3.13 into each x and perform the operation - you should get sstarica's answer

  9. anonymous
    • 5 years ago
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    so, if it says -x^2, and x is 3.13, do i write it like -(3.13^2) or -3.13^2 ?

  10. anonymous
    • 5 years ago
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    you have to substitute x first and the minus stays outside, then after getting the answer mulitply it with minus.

  11. anonymous
    • 5 years ago
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    -(3.13)^2 = -(9.7969) = -9.7969 and so on. :)

  12. anonymous
    • 5 years ago
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    thanks

  13. anonymous
    • 5 years ago
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    np :)

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