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anonymous

  • one year ago

Solve the equation. Write the smaller value of x. {x^2} - 4x - 5 = 0

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  1. LynFran
    • one year ago
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    try factoring out x^2-5x+x-5=0

  2. anonymous
    • one year ago
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    x^2*x=-1.25

  3. anonymous
    • one year ago
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    it is x=-1 @Aliypop

  4. LynFran
    • one year ago
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    x(x-5)+1(x-5)=0 (x+1)=0 and (x-5)=0 now solve for x

  5. anonymous
    • one year ago
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    Don't forget to medal and fan if you already haven't. Plus send me a message if you need more help. @Aliypop

  6. LynFran
    • one year ago
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    you would get 2 values for x...

  7. LynFran
    • one year ago
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    so x=-1 and x=5 the smaller value is x=-1

  8. anonymous
    • one year ago
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    okay

  9. anonymous
    • one year ago
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    sorry I was talking to my mom

  10. LynFran
    • one year ago
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    do you understand?

  11. anonymous
    • one year ago
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    Find the value of x. x=-20/2(-5)

  12. LynFran
    • one year ago
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    you just need to simplify to find x....what do u get?

  13. anonymous
    • one year ago
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    I can't seem to get answer for simplifying it

  14. LynFran
    • one year ago
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    |dw:1438102185070:dw|

  15. anonymous
    • one year ago
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    2

  16. LynFran
    • one year ago
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    correct

  17. anonymous
    • one year ago
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    Find the value of x. x/52= 250 do I do the same as well ?

  18. anonymous
    • one year ago
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    i got 0.1

  19. LynFran
    • one year ago
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    to find x we need to multiply both sides of the equation by 52.. so we can get x alone at 1side of the equation so|dw:1438102872500:dw|

  20. anonymous
    • one year ago
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    1,3000

  21. LynFran
    • one year ago
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    13,000 correct

  22. anonymous
    • one year ago
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    Find the value of x. 8x = - 28 Now I'm not sure if I add on this one ?

  23. LynFran
    • one year ago
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    as you can see here x is being multiply by 8....so whats the opposite of multiplication? ...that way we can get the x at 1side of the equation to solve for it...

  24. anonymous
    • one year ago
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    -2.5

  25. LynFran
    • one year ago
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    we need to divide both sides of the equation by 8

  26. LynFran
    • one year ago
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    so we get x=-28/8

  27. anonymous
    • one year ago
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    i got -3.5

  28. LynFran
    • one year ago
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    correct

  29. anonymous
    • one year ago
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    \[x^2 - 4x - 5 = 0\\x^2-5x+x-5=0\\x(x-5)+1(x-5)=0\\(x-5)[x+1]=0\\ \implies\ (x-5)=0,\ or\ (x+1)=0\\ \implies\ x=5,\ or\ x=-1\\ as\ we\ haveto\ take\ smaller\ x\\ \therefore\ x=-1\ is\ desired\ answer.\]

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