What is expand (2(15-sqrt(15)))/(21) ?

The solution to expand (2(15-sqrt(15)))/(21) is 10/7-(2sqrt(5))/(7sqrt(3))

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expand (2(15-sqrt(15)))/(21)

expand

\frac{2 ( 15 - 15 )}{21}

\frac{10}{7} - \frac{2 5}{7 3}

Decimal Notation

1.05971 \dots

Solution steps

\frac{2 ( 15 - 15 )}{21}

Expand

2 (15 - 15) : 30 - 215

= \frac{30 - 2 15}{21}

Apply the fraction rule:

\frac{a \pm b}{c} = \frac{a}{c} \pm \frac{b}{c}

\frac{30 - 2 15}{21} = \frac{30}{21} - \frac{2 15}{21}

= \frac{30}{21} - \frac{2 15}{21}

Cancel

\frac{30}{21} : \frac{10}{7}

= \frac{10}{7} - \frac{2 15}{21}

Cancel

\frac{2 15}{21} : \frac{2 5}{7 3}

= \frac{10}{7} - \frac{2 5}{7 3}

\frac{6 y - ( - 1 ) ^{y} + 3}{2}

ln (2) (x - 1)

55 (2 - 56)

\frac{36 x}{( x + 3 ) ^{2}}

(x - 2 x)^{2}

What is expand (2(15-sqrt(15)))/(21) ?
The solution to expand (2(15-sqrt(15)))/(21) is 10/7-(2sqrt(5))/(7sqrt(3))