Question

Help please? What is the square root of 54x7?

Answer 1

Hey friend !
First we have
54 = 2 . 27
and 54.7
means :
2.27.7
and
(2.27.7)^2
too !
Now answer !

Answer 2

7 is already prime. Fully factor 54, and you should easily see what (if any) factors of it are perfect squares. Remember:\[\Large \sqrt{a\cdot b }=\sqrt{a }\cdot \sqrt{ b }\] So once you fully factor the stuff under the radical sign, just "pull out" the square roots of anything that is a perfect square, and "leave alone" anything that isn't (it has to stay under the radical).