Question

(3ײ-1) × (3ײ+1)

Pessoal ????​

Answer 1

(3ײ-1) × (3ײ+1)

9x² + 3x² - 3x² - 1

9x² - 1 = 0

a) 9

b) 0

c) (-1)

∆= 9² - 4 . 0 . (-1)

∆ = 81

-b ± ✓81/ 2(-1)

x' = 9/ -2

x'= -4,5

x" = -9/ -2

x" = 4,5