Question

resolva as equações do 2 grau : 4x2-12x+5=0

Answer 1

4x²-12x+5=0

a= 4 b= -12 c= 5

Δ = b²-4.a.c
Δ = (-12)²-4.4.5
Δ = 144 - 80
Δ = 64  
√Δ = 8

x = -b±√Δ / 2.a
x = -(-12)±8/2.4
x = 12±8/8

x1 = 12+8/8
x1 = 20/8
x1 = 5/2

x2 = 12-8/8
x2 = 4/8
x2 = 1/2

S = (5/2,1/2)