Order of operations

Apr 2015
2
0
gibraltar
Good evening all,

real basic question if I may? I have the following problem in front of me and apparently I have the correct answer of -7.74 put I do not understand where the (3.3)^2 comes into play in regard to the question or order of operations... here goes:

2.5-(3.1+0.5/5)^2 (3.3)^2

basically I get (3.1+0.5/5)^2 = 10.24 therefore 10.24-2.5 =-7.74 but what effect does the (3.3)^2 have or is it a red herring or is the text book answer in correct?

thanks all
 
Apr 2015
62
6
Sweden
Assuming it is times (3.3)^2, the correct answer is -109.0136 because, (3.1+0.5/5)^2 = 10.24 if i multiply 10.24 by (3.3)^2 that gives -111.51360 and at last i add 2.5 making it -109.01360.
So i assume it is an incorrect answer.
 
Apr 2015
2
0
gibraltar
thank you kindly Krisly.

I'll leave this answer for my son to take school in the morning, he sat struggling tonight so I'll let him explain that the text book answer is in fact wrong! thanks again