Question

a²+4a-3=0 alguém pd me ajudar

Answer 1

a² +4a -3 = 0
∆=16+12=28 => √∆=√4 7 = 2√7
x' = -4+2√7/2 = -2+√7 ✓
x" = -4-2√7/2 = -2-√7 ✓

Answer 2

Resposta:

a² + 4a + 3 = 0

a=1

b=4

c=3

Δ = b² - 4 . a . c

Δ = 4² - 4 . 1 . 3

Δ = 16 - 12

Δ = 4

x = - b ± √Δ / 2a

x = - 4 ± √4 / 2.1

x = - 4 ± 2 / 2

x' = - 4 + 2 / 2

x' = - 2/2

x' = -1

x'' = - 4 -2 / 2

x'' = - 6/2

x'' = -3

S={-1;-3}