The book I am using me seems to contradict itself

**P**- Parenthesis First

**E**- Exponents and roots second

**M** - multiplication third from left to right

**D**- division third from left to right (do both multiplication and division together)

**A**-addition fourth

**S**-subtraction last

However if we are to abide by the order of operations stated above, the book seems to contradict itself in the following example

1.

**Parentheses** First:

**Exponents and ROOTS **second:Now here is where im lost. The whole expression in this case is underneath a root yet instead of taking the squared root of this whole expression the author precedes to add the numbers together to produce

and then ends simplifying the expression by considering the roots, no where near the second order in the operation

as indicated by PEMDAS, instead of exponents/roots coming second it comes last in this case.