EQST

Me ajude por favor
〖16x〗^2-4x-5=0

Me ajude por favor
〖16x〗^2-4x-5=0 Essa é a pergunta que vamos responder e mostrar uma maneira simples de se lembrar dessa informação. Portanto, é essencial você conferir a matéria completamente.
  • Me ajude por favor
    〖16x〗^2-4x-5=0
  • Me ajude por favor
    〖16x〗^2-4x-5=0


    〖16x〗^2-4x-5=0 16x² – 4x – 5 = 0            a= 16         b= -4           c = -5 Δ= b² – 4ac Δ= (-4)² – 4(16)(-5) Δ= 16 + 320 Δ= 336        se  Δ>0     então      x =  – b = – √Δ/2a x’ =  -(-4) – √ 336/ 2(16) x’ =  +4   – √336/32                              fatorando            336| 2                                                                                        168| 2                                                                                          84| 2                                                                                          42| 2                                                                                          21| 3                                                                                            7| 7                                                                                                                                 então:     √336  =   2.2.2.2.3.7  =  2² . 2² . 3¹. 7¹  =  2.2√3.7  =  4√21 continuando x’ = + 4  – √336/32 x’ = + 4 – 4√21                + 1 – 1√21                 + 1 – √21        ————–  =     x’    ————-   =  x’=      ————             32                              8                                8        +4 + 4√21               + 1   + 1√21              + 1+ √21 x” = ————-  =     x”=  —————  =    x”=  ————             32                              8                                8