The solution to sqrt(4.2) is sqrt(21/5)

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simplify sqrt(4.2)

Solution

simplify

4.2

\frac{21}{5}

Decimal Notation

2.04939 \dots

Solution steps

4.2

Multiply and divide by 10 for every number after the decimal point

There is

1

digit to the right of the decimal point, therefore multiply and divide by

10

= \frac{10 \cdot 4.2}{10}

Multiply the numbers:

10 \cdot 4.2 = 42

= \frac{42}{10}

Cancel

\frac{42}{10} : \frac{21}{5}

= \frac{21}{5}

- \frac{5}{- 1}

\frac{50}{40}

x^{2} (p + q) + y^{2} (p + q)

\frac{1}{4} + \frac{5}{4}

4 d + 6 + 2 d