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3 years ago

4 1 / ( - ) 5 15

Mathematics

1 answer:

Allushta [10]3 years ago

5 0

4 over 5 divided by (-1 over 15)

that means:

$\frac{4/5}{-1/15} = -\frac{4*15}{1*5} =- \frac{4*3*5}{5}=-4*3=-12$

I hope you got satisfied

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Make a substitution:

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Then the system becomes

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Simplifying the equations gives

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which is to say,

$\dfrac{4\sqrt[3]{u^4}}{u^2-v^2}=\dfrac{81\times4\sqrt[3]{v^4}}{u^2-v^2}$

$\implies\sqrt[3]{\left(\dfrac uv\right)^4}=81$

$\implies\dfrac uv=\pm27$

$\implies u=\pm27v$

Substituting this into the new system gives

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$\implies u=\pm27$

Then

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(meaning two solutions are (7, 13) and (-7, -13))

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2 years ago

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4 1 __ / ( - __ ) 5 15

4 1 / ( - ) 5 15