Question

×= -b- √b²- 4ac para a=3, b=4 e c= -1

Answer 1

Boa tarde Paulovictor

3x² + 4x - 1 = 0

a = 3
b = 4
c = -1

delta
d² = b² - 4ac
d² = 16 - 4*3*(-1)
d² = 16 + 12 = 28 = 4*7
d = 2√7 

x1 = (-b + d)/2a 
x1 = (-4 + 2√7)/6 = (-2 + √7)/3

x2 = (-b - d)/2a
x2 = (-4 - d√7)/6 = (-2 - √7)/3