Question

Rationalise the denominator of

4/√5​

Answer 1

Step-by-step explanation:

4

root 5

4 × root 5

root 5 root 5

4 root 5

5

Answer 2

Step-by-step explanation:

multiple 4/√5 and √5/√5

4√5/√5 √5

raised √5 to power of 1

use a power rule =

a to power of m

a to power of n

= a m+n

4√5/√5 1+1

add 1+1

rewrite √5² as 5

use a = x/m to rewrite √5 as 5 1/2

apply power rule =

(a)mn

combine1/2and2

cancel the common factor 2

divide 1/1

4√5/ 5 raised to power of 1

eqvatuate the following

Decimal Form:

1.78885438

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