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purplemexican

  • one year ago

im getting x=-6 is that correct? @Nnesha @madhu.mukherjee.946 @mathstudent55

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  1. Purplemexican
    • one year ago
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  2. Nnesha
    • one year ago
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    how did you get -6 ?

  3. Purplemexican
    • one year ago
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    im not entirely sure im still half asleep

  4. Nnesha
    • one year ago
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    show ur work. same like the last one 1st) take square both sides

  5. Nnesha
    • one year ago
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    \[\huge\rm ( \sqrt{-3x-2})^2=(x+2)^2\] when you take square on left side square root would cancel out \[\huge\rm -3x-2=(x+2)^2\] now solve for x (x+2)^2 is same as (x+2)(x+2) apply the foil method

  6. Purplemexican
    • one year ago
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    \[-3x -2=(x+2)^2 \]

  7. Purplemexican
    • one year ago
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    x=-6, -1

  8. Nnesha
    • one year ago
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    hmm

  9. Purplemexican
    • one year ago
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    -1 works as a solution and so does -6 how am i still getting these

  10. Nnesha
    • one year ago
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    yes so answer is what ?

  11. Purplemexican
    • one year ago
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    i don't know I'm so confused right now

  12. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @purplemexican -1 works as a solution and so does -6 how am i still getting these \(\color{blue}{\text{End of Quote}}\) okay substitute x for -6

  13. Nnesha
    • one year ago
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    \[\sqrt{-3(-6)-2}=-6x+2\] both sides are e qual ?

  14. Purplemexican
    • one year ago
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    thats where i messed up

  15. Purplemexican
    • one year ago
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    i did -3(-6)-2=(-6+2)^2

  16. Nnesha
    • one year ago
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    no don't take square root on right side

  17. Nnesha
    • one year ago
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    we need to plug in -6 into the original equation :=)

  18. Nnesha
    • one year ago
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    \(\color{blue}{\text{Originally Posted by}}\) @Nnesha \[\sqrt{-3(-6)-2}=-6x+2\] both sides are e qual ? \(\color{blue}{\text{End of Quote}}\) correction \[\sqrt{-3(-6)-2}=-6+2\] both sides are e qual ?

  19. Nnesha
    • one year ago
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    1sT) multiply -3 times -6 2nd) subtract -2 take square root of that number

  20. Purplemexican
    • one year ago
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    4

  21. Nnesha
    • one year ago
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    okay so 4=-6+2 both sides are equal ?

  22. Purplemexican
    • one year ago
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    no

  23. Nnesha
    • one year ago
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    so that's an extraneous solution

  24. Purplemexican
    • one year ago
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    thank you again

  25. Nnesha
    • one year ago
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    my pleasure. good job!

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