Question

se A=x²+1 e B=-2x²+x+2​

Answer 1

A) x²+1-2x²+x+2
= -1x²+x+3
b) x²+1+2x²-x-2
= 3x²-x-1
c) -2x²+x+2-x²-1
= -3x²+x+1
d)3.(x²+1)
= 3x²+3

espero ter ajudado :)