Question

expliquem pra mim pfv. Obrigada!

Answer 1

Olá Lylian 

A - xB =

(2 - 4x) (1 - 2x)
(3 - 3x) (4 + x)

det = (2 - 4x)(4 + x) - (1 - 2x)(3 - 3x) = 0

8 + 2x - 16x - 4x² - (3 - 3x - 6x + 6x²) = 0

-10x² - 5x + 5 = 0

-2x² - x + 1 = 0

delta
d² = 1 + 8 = 9
d = 3

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