Question

sqrt{169/100}

Answer 1

can you tell me what 13^2 is?

Answer 2

169

Answer 3

remember that sqrt(x/y) = sqrt(x) / sqrt(y)

Answer 4

ok and 10^2 is 100

so really what we have is:
\[\sqrt{\frac{13^2}{10^2}} =\sqrt{(\frac{13}{10})^2}\]

Answer 5

can you see how writing it like that helps?