Question

4x elevado a 2 - 3x - 1 = 0

Answer 1

A = 4, B = -3, C = -1

∆ = b² - 4.a.c

∆ = -3² - 4.4.( -1 )

∆ = 9 + 16

∆ = 25

X = -(-3) + - √25/2.4

X = 3 + - √5/8

X' = 3 - 5/8 > X' = -2/8 > X' = -1/4

X'' = 3 + 5/8 > X'' = 8/8 > X'' = 1

S = { -1/4 , 1}