What is (15sqrt(21)-5sqrt(42))/(5sqrt(7)) ?

The solution to (15sqrt(21)-5sqrt(42))/(5sqrt(7)) is (3sqrt(21)-sqrt(42))/(sqrt(7))

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simplify (15sqrt(21)-5sqrt(42))/(5sqrt(7))

simplify

\frac{15 21 - 5 42}{5 7}

\frac{3 21 - 42}{7}

Decimal Notation

2.74666 \dots

Solution steps

\frac{15 21 - 5 42}{5 7}

Factor out common term

5 : 5 (321 - 42)

= \frac{5 ( 3 21 - 42 )}{5 7}

Cancel the common factor:

5

= \frac{3 21 - 42}{7}

i^{- 20}

(20)^{\frac{5}{2}}

20 (a + 1) - 21 (a - 1)

(2 x + 2 y) - (x - 2 2 y)

\frac{3}{4} + \frac{7}{2} - \frac{3}{8}

What is (15sqrt(21)-5sqrt(42))/(5sqrt(7)) ?
The solution to (15sqrt(21)-5sqrt(42))/(5sqrt(7)) is (3sqrt(21)-sqrt(42))/(sqrt(7))