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mushinni

  • 3 years ago

PLEASE CAN YOU HELP ME? I'm stuck Simplify the radical expressions sqrt 7 (sqrt 14 + sqrt 3) sqrt 45n^5

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  1. mushinni
    • 3 years ago
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    on the first one I got until here sqrt 7 * sqrt 14 + sqrt 7 * sqrt 3 sqrt 7 * sqrt 7x2 + ......

  2. mushinni
    • 3 years ago
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    and on the second one until here: sqrt 5*9*n^2*n^2*n = sqrt 5 * sqrt 9 * sqrt n^2 * sqrt n^2 * sqrt n

  3. campbell_st
    • 3 years ago
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    the 1st question is simply \[\sqrt{7} \times \sqrt{14} + \sqrt{7} \times \sqrt{3} = \sqrt{ 7 \times 14} + \sqrt{7 \times 3}\] you need to simplify it the 2nd question \[\sqrt{45n^5} = \sqrt{9n^4 \times 5n} = \sqrt{9n^4} \times \sqrt{5n}\] just simplify

  4. mushinni
    • 3 years ago
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    so on the fist one was I right?

  5. mushinni
    • 3 years ago
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    I just missed the sqrt 7x3 right?

  6. campbell_st
    • 3 years ago
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    going back to the 1st question \[\sqrt{7 \times 14} = \sqrt{98} = \sqrt{49 \times 2}\] which can be simplified.

  7. mushinni
    • 3 years ago
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    into... sqrt 7x2 ?

  8. campbell_st
    • 3 years ago
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    well \[\sqrt{49} \times \sqrt{2} = 7\sqrt{2}\] so the 1st question is \[7\sqrt{2} + \sqrt{21}\] the 2nd question \[\sqrt{9n^4} \times \sqrt{5n} = 3n^2\sqrt{5n}\] hope this makes sense.

  9. mushinni
    • 3 years ago
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    second question final form. is it. \[3n ^{2} \sqrt{5n}\]

  10. mushinni
    • 3 years ago
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    oh! ok I busy making the equation haha

  11. mushinni
    • 3 years ago
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    yes on the second yes it does

  12. campbell_st
    • 3 years ago
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    glad to help

  13. mushinni
    • 3 years ago
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    oh ok! got the firt one

  14. mushinni
    • 3 years ago
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    thank you very much!

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