Question

resolva cada equacao do segundo grau a seguir ​

Answer 1

Resposta:

b) a=1

b=9

c=0

∆=b²-4ac

∆=81-4(1)(0)

∆=81-0

x=-b±√∆÷2.a

x=-(9)±√81÷2.(1)

x=-9±(9)÷2

x¹=-9+9÷2=0÷2

x²=-9-9÷2=-18÷2=-9

c)a=6

b=7

c=0

∆=b²-4ac

∆=(49)-4(6)(0)

∆=49-0

∆=49

×=-b±√∆÷2a

×=-(7)±√49÷2(6)

×=-7±7÷12

×¹=-7+(7)÷12=0÷12

ײ=-7-7÷12=-14÷12

d)a=-4

b=0

c=1

∆=b²-4ac

∆=(0)²-4(-4)(1)

∆=0+16

∆=16

×=-b±√∆÷2a

×=-(0)±√16÷2(-4)

×=0±4÷-8

×¹=0+4÷-8=4÷-8

ײ=0-4÷-8=-4÷8

e)a=-1

b=0

c=5

∆=b²-4ac

∆=(0)²-4(-1)(5)

∆=0+25

∆=25

×=-b±√∆÷2a

×=-(0)±√25÷2(-1)

×=0±5÷-2

×¹=0+5÷-2=5÷-2

ײ=0-5÷-2=-5÷-2

Obs:não sei fazer a 1