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anonymous

  • 5 years ago

complete square root add what number to both sides to x^2-6x=-8

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  1. amistre64
    • 5 years ago
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    what is a complete square?

  2. amistre64
    • 5 years ago
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    add (b/2)^2

  3. anonymous
    • 5 years ago
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    I did that I need a whole number I came up with 1 but it is not right

  4. anonymous
    • 5 years ago
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    -6/2 = -3 then you square that (-3)^2 = 9

  5. amistre64
    • 5 years ago
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    blext didnt get a 1 ;)

  6. anonymous
    • 5 years ago
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    b=-6/2^2 = 36/4

  7. amistre64
    • 5 years ago
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    yes; and 36/4 = 9

  8. anonymous
    • 5 years ago
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    where so you get 36?

  9. amistre64
    • 5 years ago
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    6^2 = 36 --------- = 9 2^2 = 4

  10. anonymous
    • 5 years ago
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    formula x^-6x=-8 b=(-6/2)^2

  11. anonymous
    • 5 years ago
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    36/4 =9 so I put 9 on each side of the equation?

  12. amistre64
    • 5 years ago
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    welll close; b = -6; the number you wanna add to both sides is: (b/2)^2

  13. amistre64
    • 5 years ago
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    yes; add 9 to both sides to complete the square

  14. anonymous
    • 5 years ago
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    okay that is not the example in my book

  15. amistre64
    • 5 years ago
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    there are many ways to get to the same answer; you gotta pick what works for you :)

  16. anonymous
    • 5 years ago
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    this is true I am taking this test for my last time on my math lab and want to get the correct answers.

  17. amistre64
    • 5 years ago
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    the real solution is: (bx/2ax)^2 but for the a=1 thats rather obiquitous. and the x's always cancel anyways.

  18. anonymous
    • 5 years ago
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    thank you

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