Without seeing exactly what you've done it's hard to say where you went wrong.
I'm rushing through review homework and I came up against one that I can't solve for the same answer the book has.
The book says this evaluates to 10. I am getting something more like
Any ideas what I might be doing wrong? I suspect it's order of operations but I can't nail it.
And again, that also makes a lot of sense, I did not realize that. So the negative is applied after the 5 is squared? Is this always the case without parentheses or is it particular to the leading term of the expression? Apologies, I am returning to math after a 15 year layoff and I've clearly forgotten some details.