Respostas

  • Usuário do Brainly
2014-07-14T02:13:29-03:00
(m-2) x^{2} -3mx+1=0

S=P

 \frac{-b}{a}= \frac{c}{a}

 \frac{3m}{m-2} = \frac{1}{m-2}

3m=1

m= \frac{1}{3}

16)
 x^{3} +5=(x+1) ^{3} -32

 x^{3} +5= x^{3} +3 x^{2} +3x+1-32

3 x^{2} +3x-36=0   (dividir por 3)

 x^{2} +x-12=0

Δ=1+48

Δ=49
√Δ=7

x'= \frac{-1+7}{2} = \frac{6}{2} =3

x"= \frac{-1-7}{2} = \frac{-8}{2} =-4

S={-4,3}