Question

A) 4x²_16=0
b) x²+5x+6=0​

Answer 1

Resposta:

a)x=2 e -2

b) x=-2 e -3

Explicação passo-a-passo:

a)4x²-16=0

a=4 b=0 c=16

D=b²-4ac

D=0²-4*4*(-16)

D=0+16*16

D=256

x=(-b+/-√256) /2a

x1=16/2*4

x1=16/8

x1=2

x2=-16/8

x2=-2

B)x²+5x+6

a=1 b=5 c=6

D=5²-4*1*6

D=25-24

D=1

x=(-5+/-√1)/2*1

x1=(-5+1)/2

x1=-4/2

x1=-2

x2=(-5-1)/2

x2=-6/2

x2=-3