Question

Dados A = x2 – 2x + 1 e B = x2 – 1 encontre A – B.

a) 2x2 – 2x
b) 2x2 – 2x + 2
c) x2 – 1
d) x2 – 2
e) –2x + 2

OBS.: com conta pfv

Answer 1

a = x² -2.x +1

a = x² -2.x +1b = x² -1

a -b

x² -2.x +1 -( x² -1)

x² -x² -2.x +1 +1

-2.x +2

Dúvidas só perguntar!

Answer 2

Dados A = x^2 – 2x + 1 e B = x^2 – 1 encontre A – B.

A - B =  x^2 – 2x + 1 - x^2 + 1 = -2x + 2 (E)