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Life

  • 3 years ago

what is the solution set of the equation? look below.

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  1. Life
    • 3 years ago
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    |dw:1352795823759:dw|

  2. hartnn
    • 3 years ago
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    x-2 =sqrt(...) now square both sides.

  3. Life
    • 3 years ago
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    where did u get x from?, those variables are y

  4. hartnn
    • 3 years ago
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    oh, its y .... y-2 =sqrt(...) now square both sides.

  5. Life
    • 3 years ago
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    y-2 = y(squared)-12

  6. hartnn
    • 3 years ago
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    (a-b)^2 =a^2-2ab+b^2

  7. hartnn
    • 3 years ago
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    so, (y-2)^2= ?

  8. Life
    • 3 years ago
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    y(2qaured) + 4

  9. hartnn
    • 3 years ago
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    nopes, where is -2ab term ?

  10. Life
    • 3 years ago
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    -4y?

  11. hartnn
    • 3 years ago
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    yes.

  12. Life
    • 3 years ago
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    +16?

  13. hartnn
    • 3 years ago
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    (y-2)^2= y^2-4y+4 y^2-4y+4= y^2-12 solve this for y

  14. Life
    • 3 years ago
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    y=4

  15. Life
    • 3 years ago
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    which means that the solution set is just 4 am i right?

  16. hartnn
    • 3 years ago
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    yes.

  17. jishan
    • 3 years ago
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    yeah right

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