Question

Dada a função 2+x 1-x ao quadrado

Answer 1

Oi Adriana

2 + x - x² = 0

x² - x - 2 = 0

delta
d² = 1 + 8 = 9
d = 3

x1 = (1 + 3)/2 = 4/2 = 2
x2 = (1 - 3)/2 = -2/2 = -1

.