Question

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$( \sqrt{49 \: } \: pe \: 100 - \sqrt{4 \: } pe \: 25) { - }^{1}$

Answer 1

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Answer 2

$\it\ \left(\dfrac{\sqrt{49}}{100} - \dfrac{\sqrt4}{25}\right)^{-1} = \left(\dfrac{7}{100} - \dfrac{^{4)}2}{ \ 25} \right)^{-1} = \left(\dfrac{7-8}{100} \right)^{-1} = \left(\dfrac{-1}{100} \right)^{-1} = \\ \\ \\ = \dfrac{100}{-1} = -100$