The expression is:
[tex]\sqrt[]{98m^{12}}[/tex]We need to use a factor tree to solve the problem. We will draw it as shown below:
According to the factor tree we can represent the 98 as:
[tex]\sqrt[]{2\cdot7^2m^{12}}[/tex]We can now remove the terms that have a power of 2 and a power of 12. For that we need to divide the exponents by 2.
[tex]7^{}\sqrt[]{2}m^6[/tex]The simplified expression is 7*sqrt(2)*m^6.