What is expand (5(9-sqrt(21)))/3 ?

The solution to expand (5(9-sqrt(21)))/3 is 15-(5sqrt(7))/(sqrt(3))

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expand (5(9-sqrt(21)))/3

expand

\frac{5 ( 9 - 21 )}{3}

15 - \frac{5 7}{3}

Decimal Notation

7.36237 \dots

Solution steps

\frac{5 ( 9 - 21 )}{3}

Expand

5 (9 - 21) : 45 - 521

= \frac{45 - 5 21}{3}

Apply the fraction rule:

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

\frac{45 - 5 21}{3} = \frac{45}{3} - \frac{5 21}{3}

= \frac{45}{3} - \frac{5 21}{3}

Divide the numbers:

\frac{45}{3} = 15

= 15 - \frac{5 21}{3}

Cancel

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

= 15 - \frac{5 7}{3}

\frac{2 e ^{x} + 5}{in ( 3 + x )}

\frac{( s ^{2} - 4 )}{( s ^{2} + 4 ) ^{2}}

- \frac{2}{s ( s ^{2} + 1 )}

4 (+ 6) + 5 (- 7)

(e^{x} - 1)^{2} (e^{x} + 1)

What is expand (5(9-sqrt(21)))/3 ?
The solution to expand (5(9-sqrt(21)))/3 is 15-(5sqrt(7))/(sqrt(3))