Question

Can anyone explain me the step marked in the picture

Answer 1

Answer:

look its wasy...

Step-by-step explanation:

look in they what did is that....

if you take any no out the root then we have to make its root and vice versa...

so when they remove 4 out it becomes 2.... and if they take 2 inside it will be 2 square=4 so

...

same with 25....

then the root 5 is common so you can add and sub the outside....

please follow me and mark me THE BRAINLIEST

Answer 2

Answer:

5√5 ans

Step-by-step explanation:

8√5 + 2√5( 2 square = 4, so √4= 2 and 5 remains as it is) - 5√5 ( 5 square = 25, so √25= 5 and another 5 remains as it is)

(8 + 2 - 5)√5 ( as every no. has √5 in common)

we get 5√5 after solving