Simplify- 7-5 - 4-5-125

The correct option is D 8√(5) 7√(5) 4√(5)+√(125) =7√(5) 4√(5)+5√(5) =(7 4+5)√(5)=8√(5) ...

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Operations on Rational and Irrational Numbers

Simplify: 7√...

Question

Simplify:
$7 \sqrt{5} - 4 \sqrt{5} + \sqrt{125}$

3 \sqrt{5}

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4 \sqrt{5}

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5 \sqrt{5}

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8 \sqrt{5}

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Solution

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Simplify:

(i) $\frac{25 \times t^{- 4}}{5^{- 3} \times 10 \times t^{- 8}}$

\frac{3^{- 5} \times 10^{- 5} \times 125}{5^{- 7} \times 6^{- 5}}

9 \sqrt{5} - 4 \sqrt{5} + \sqrt{125}, 5 \sqrt{3} + 8 \sqrt{3}

{(\frac{5}{8})}^{- 7} \times {(\frac{8}{5})}^{- 5}

{(0.00032)}^{3 / 5} \times {(\frac{8}{125})}^{- 4 / 3}

\frac{3^{- 5} \times 10^{- 5} \times 125}{5^{- 7} \times 6^{- 5}}

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