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Tabbiejack

  • 2 years ago

Solve the equation. Check your solution. 4= √h-6 A. 10 B. 100 C. √10 D. 5

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  1. ToniStark
    • 2 years ago
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    |dw:1370237549168:dw|

  2. UnkleRhaukus
    • 2 years ago
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    |dw:1370237614254:dw|

  3. Tabbiejack
    • 2 years ago
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    I got A is right

  4. UnkleRhaukus
    • 2 years ago
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    check it; is \(4= \sqrt{10}-6\) ? \[10=\sqrt{10}\] no.

  5. UnkleRhaukus
    • 2 years ago
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    \[4= \sqrt{h}-6\\4+6= \sqrt{h}\\10=\sqrt{h}\\10^2=h \]

  6. Tabbiejack
    • 2 years ago
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    ok so its d

  7. UnkleRhaukus
    • 2 years ago
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    check \[4= √5-6\\10=\sqrt5? \] no

  8. Tabbiejack
    • 2 years ago
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    c?

  9. Tabbiejack
    • 2 years ago
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    I dont get it

  10. UnkleRhaukus
    • 2 years ago
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    lets start for the start. \[4=\sqrt{h}-6\] add six to both sides \[4+6=\sqrt{h}-6+6\] tell me what you get when simplifying this

  11. Tabbiejack
    • 2 years ago
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    ok

  12. UnkleRhaukus
    • 2 years ago
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    ...

  13. Tabbiejack
    • 2 years ago
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    idk this is awful c right

  14. UnkleRhaukus
    • 2 years ago
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    \[4+6=\sqrt{h}-6+6\] simplify the term in the brackets \[(4+6)=\sqrt{h}+(-6+6)\]

  15. Tabbiejack
    • 2 years ago
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    O ok 100

  16. UnkleRhaukus
    • 2 years ago
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    what do you get when you simplify (4+6)?

  17. Tabbiejack
    • 2 years ago
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    10

  18. UnkleRhaukus
    • 2 years ago
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    right, what about (-6+6) ?

  19. Tabbiejack
    • 2 years ago
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    0

  20. UnkleRhaukus
    • 2 years ago
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    GOOD so you have \[10=\sqrt{h}\] Now square both sides \[10^2=\sqrt{h}^2\] simplify this

  21. Tabbiejack
    • 2 years ago
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    100

  22. UnkleRhaukus
    • 2 years ago
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    yes the left hand side = 100, what about the right hand side?

  23. Tabbiejack
    • 2 years ago
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    same

  24. UnkleRhaukus
    • 2 years ago
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    \[\sqrt h^2=h\]

  25. UnkleRhaukus
    • 2 years ago
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    so you have arrived at \[100=h\] now lets check. \[4= \sqrt{100}-6\] \[4=\sqrt{10^2}-6\\4=10-6\]

  26. Tabbiejack
    • 2 years ago
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    o ok that was confusing me....

  27. Tabbiejack
    • 2 years ago
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    so its B

  28. UnkleRhaukus
    • 2 years ago
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    yes, because 4=4 is always true

  29. Tabbiejack
    • 2 years ago
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    thanks so much!!

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