- #1
logicandtruth
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- TL;DR Summary
- General operations query
I am trying to imporove my general maths and revisting my pre-college text books. For the above example question, my answer was 4 which is not correct as it is -4. The only difference I can see in my working is the first operation 3a^2. Here I simply did 3 x -2^2 which is -12 but in the answer working in blue font it shows (-2)^2 in brackets. This of course changes the answer due to BODMAS as 3(-2)^2 is 12 as -2 x -2 = 4. But is it correct to simply inser a bracket when the question does not show one?