Question

x²-6x+8=0

x²-8x12=0

x²-5x+6=0​

Answer 1

Resposta:

Explicação passo a passo:

x²-6x+8=0

a=1

b=-6

c=8

x=6+-V(-6)²-4.1.8/2.1

x=6+-V36-32/2

x=6+-V4/2

x=6+-2/2

x'=6+2/2=8/2=4

x''=6-2/2=4/2=2

S={2,4}

x²-8x+12=0

a=1

b=-8

c=12

x=8+-V(-8)²-4.1.12/2.1

x=8+-V64-48/2

x=8+-V16/2

x=8+-4/2

x'=8+4/2=12/2=6

x''=8-4/2=4/2=2

S={2,6}

x²-5x+6=0

a=1

b=-5

c=6

x=5+-V(-5)²-4.1.6/2.1

x=5+-V25-24/2

x=5+-V1/2

x=5+-1/2

x'=5+1/2=6/2=3

x''=5-1/2=4/2=2

S={3,2}