Question

Me Ajudem Por Favor! (Bhaskara)

A)5x²-18x-3=0

B)-3x²+19x-20=0

Answer 1

a)

1°passo

∆=(-18)elevado 2-4(5).(-3)

∆=324+60

∆=384

2°passo

x=-(b)+√∆

________

2(a)

x1=-(-18)+√384

___________

2(5)

x1=18+19,59 37,59

__________ = _______ = 3,759

10 10

x2= 18-19,59 1,59

_________ = ______ = 0,159

10 10

b)

1°passo

∆=(19)elevado 2-4(-3).(-20)

∆=361-240

∆=131

2°passo

x=-(b)+√∆

_________

2(a)

x1=-(19)+√131

_____________

2(-3)

x1=-19+11,44 - 7,56

__________ = ______ = 1,26

-6 -6

x2= -19-11,44 -30,44

__________ = _______ = 5,07

-6 -6