Use a factor tree to help find the $\sqrt{196}$√196.
Write $196$196 as a product of prime factors in index notation.
Hence find the $\sqrt{196}$√196.
Consider $\sqrt{225}$√225.
Use a factor tree to help find $\sqrt{30625}$√30625.
Use a factor tree to help find $\sqrt{3969}$√3969.