Question

ME AJUDA POR FAVOR EU PRECISO MUITO DE AJuda de vcs por favor me ajudem !!!!!​

Answer 1

vc divide o valor pela equação

Answer 2

Resposta:

2a) x²-9=0

a= 1 b= 0 c= -9

∆=b²-4ac

∆= 0²- 4×1×(-9)

∆= 0+36

∆=36

√∆= 6

x= -b+-√∆/2a

x= 0+-6/2×1

x1= 0+6/2= 6/2= 3

x2= 0-6/2= -6/2= -3

S={3,-3}

b) x²-36=0

a= 1 b= 0 c= -36

∆= b²- 4ac

∆= 0²- 4×1×(-36)

∆= 0+144

∆=144

√∆= 12

x= -b+-√∆/2a

x= 0+-12/2×1

x1= 0+12/2= 12/2= 6

x2= 0-12/2= -12/2= -6

S={6,-6}

c) x²-144=0

a= 1 b= 0. c= -144

∆= b²-4ac

∆= 0²- 4×1×(-144)

∆= 0+576

∆= 576

√∆= 24

x= -b+-√∆/2a

x= 0+-24/2×1

x1= 0+24/2= 24/2= 12

x2= 0-24/2= -24/2= -12

S= {12,-12}

d) 2x²-128=0

a= 2 b= 0 c= -128

∆= b²-4ac

∆= 0²-4×2×(-128)

∆= 0+ 1024

∆= 1024

√∆= 32

x= -b+-√∆/2a

x= 0+-32/2×2

x1= 0+32/4= 32/4= 8

x2= 0-32/4= -32/4= -8

S= {8,-8}

e) x²-4x=0

a= 1 b= -4 c=0

∆= b²-4ac

∆= (-4)²-4×1×0

∆= 16-0

∆= 16

√16= 4

x= -b+-√∆/2a

x= -(-4)+-4/2×1

x1= 4+4/2= 8/2= 4

x2= 4-4/2= 0/2= 0

S={4,0}