What is b(0.2)/((sqrt(21)-5))-3/((sqrt(21)+5)) ?

The solution to b(0.2)/((sqrt(21)-5))-3/((sqrt(21)+5)) is b/(5(sqrt(21)-5))+(3sqrt(21)-15)/4

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simplify b(0.2)/((sqrt(21)-5))-3/((sqrt(21)+5))

simplify

b \frac{0.2}{( 21 - 5 )} - \frac{3}{( 21 + 5 )}

\frac{b}{5 ( 21 - 5 )} + \frac{3 21 - 15}{4}

Solution steps

b \frac{0.2}{21 - 5} - \frac{3}{21 + 5}

\frac{0.2}{21 - 5} = \frac{2}{10 ( 21 - 5 )}

= b \frac{2}{10 ( 21 - 5 )} - \frac{3}{21 + 5}

Simplify

b \frac{2}{10 ( 21 - 5 )} : \frac{b}{5 ( 21 - 5 )}

= \frac{b}{5 ( 21 - 5 )} - \frac{3}{21 + 5}

Cancel

\frac{3}{21 + 5} : - \frac{3 21 - 15}{4}

= \frac{b}{5 ( 21 - 5 )} - (- \frac{3 21 - 15}{4})

Apply rule:

a - (- b) = a + b

\frac{b}{5 ( 21 - 5 )} - (- \frac{3 21 - 15}{4}) = \frac{b}{5 ( 21 - 5 )} + \frac{3 21 - 15}{4}

= \frac{b}{5 ( 21 - 5 )} + \frac{3 21 - 15}{4}

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(\frac{1 + d}{2 i})^{- 2}

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What is b(0.2)/((sqrt(21)-5))-3/((sqrt(21)+5)) ?
The solution to b(0.2)/((sqrt(21)-5))-3/((sqrt(21)+5)) is b/(5(sqrt(21)-5))+(3sqrt(21)-15)/4