Question

sabendo que A= x² -2x +1, B= x² +1 e C = x-1 determine: A-B+C

Answer 1

A -B +C = (x² -2x +1) - (x² +1) + (x-1)
A -B +C = x² -2x +1 -x² -1 +x -1
A -B +C = -2x + x - 1
A -B +C = -x -1