anonymous
  • anonymous
Simplify the following expression \[\sqrt{-90}\sqrt{-15}\]
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
HELP
anonymous
  • anonymous
i'd help you if i could but i don't know anything about complex numbers, and you'd have to use those right? :P
anonymous
  • anonymous
DO YOU KNOW HOW TO DO SCIENTIFIC NOTATION NUMBER

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anonymous
  • anonymous
yeah. the answer to your question though is -15(6)^0.5
anonymous
  • anonymous
DO YOU UNDERSTAND HOW TO DO Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (1.83 · 106) / (1.2 · 104)
anonymous
  • anonymous
any help anyone
UnkleRhaukus
  • UnkleRhaukus
complex numbers are not required to solve this problem \[\sqrt{-90}\sqrt{-15}\]\[=\sqrt{(-90 \times -15)} \]\[=\sqrt{-1\times 3^2\times2\times5\times -1\times 3\times 5}\]\[=\sqrt{-1^2 \times 2 \times 3^3\times 5^2}\]\[=\sqrt{2\times3^3\times5^2}\]\[=5\times 3\sqrt{2\times3}\]\[=15\sqrt6\]\[\approx36.74=3.674\times10^1\]
UnkleRhaukus
  • UnkleRhaukus
\[\frac{(1.83 \times 10^6) }{ (1.2 \times 10^4)}\]\[=\frac{1.83}{1.2}\times10^2\]\[=1.525\times10^2\]
anonymous
  • anonymous
complex number are required... |dw:1333349997001:dw|
UnkleRhaukus
  • UnkleRhaukus
dpalnc has it right i see now that one cannot simply combine terms of the same exponent, i guess i made my mistake in the first step

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