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3 years ago

A) Rationalise the denominator of a,b,c

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

7 0

Answer:

See below

Step-by-step explanation:

$\frac{20}{ \sqrt{10} } = \frac{20 \sqrt{10} }{ \sqrt{10} \times \sqrt{10} } = \frac{20 \sqrt{10} }{10} = 2 \sqrt{10}$

$\frac{ \sqrt{2} }{2 \sqrt{5} - 1 } \\ \\ = \frac{ \sqrt{2} \times (2 \sqrt{5} + 1 )}{(2 \sqrt{5} - 1)(2 \sqrt{5} + 1) } \\ \\ = \frac{ \sqrt{2} \times 2 \sqrt{5} + \sqrt{2} \times 1 }{(2 \sqrt{5} ) ^{2} - (1)^{2}} \\ \\ = \frac{ 2 \sqrt{10} + \sqrt{2}}{20 - 1} \\ \\ = \frac{ 2 \sqrt{10} + \sqrt{2}}{19} \\ \\ equating \: it \: with \: \\ \frac{ a + \sqrt{b}}{c} \\ \\ a = 2 \sqrt{10} \\ \\ b = 2 \\ \\ c = 19$

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3 years ago

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Drupady [299]

Answer:

At least 6 shirts should be brought to avail a total reduction of Rs 40.

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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Ierofanga [76]

Answer:

$T_b=(x-3)\textdegree$

Step-by-step explanation:

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3 years ago