Question

2x ao quadrado + x=1

Answer 1

2x² + x = 1

2x² + x - 1 = 0

Δ = b²−4ac

Δ = (1)²−4⋅(2)⋅(−1)

Δ = 1 + 8

Δ = 9

x = -b ± √Δ / 2a

x = -1 ± √9 /2.2

x = -1 ± 3 / 4


x' = -1 + 3 / 4

x' = 2 / 4

x' = 1/2

x'' = -1 - 3 / 4 

x'' = -4 / 4


x'' = -1


S = {1/2, -1}

BONS ESTUDOS!!!!!!!!!!!!!!....