perform the opertaion and write the result in standard form...

Question

(2x^2 + 1) - (x^2 - 2x + 1)

Answer 1

all the signs change in the last grouping symbol

2x^2+1-x^2+2x-1
group...
2x^2-x^2 + 2x +1-1
now combine like terms, and you are done.