Answer :

We have to simplify the expression , it means

we have to try to factor every number and and every variable , and try to factor out those which can be factored out from the square root

first number is 625

Lets try to write prime factors of 625

625 = 5*5*5*5

Next are x^20 and y^8

Now square root will divide each exponent by 2

So we get

[tex] \sqrt{625x^20y^8} [/tex]

= [tex] \sqrt{5*5*5*5*x^{20}y^8} [/tex]

=[tex] \sqrt{5^4x^{20}y^8} [/tex]

=[tex] 5^2 x^{10} y^4 [/tex]

= [tex] =25x^{10} y^4 [/tex]

So this is the answer.

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Rewritten by : Jeany

[tex] \sqrt {625x^{20}y^8} = 25x^{10}y^4[/tex]