Question

As raízes da equação 4x^-121=0

Answer 1

Resposta:

Δ = b² - 4 × a × c

Δ = 0² - 4 × 4 × (-121)

Δ = 0 - (-1936)    

Δ = 1936

( - )( - ) = ( + )

$Delta=1936\\x'=\frac{\sqrt{delta}}{2*a}\\x'=\frac{\sqrt{1936}}{2*4}\\x'=\frac{44}{8}\\x'=\frac{22}{4}\\\\x"=\frac{-\sqrt{delta}}{2*a}\\x"=\frac{-\sqrt{1936}}{2*4}\\x"=\frac{-44}{8}\\x"=-\frac{22}{4}\\\\(\frac{22}{4},-\frac{22}{4})$

Explicação passo-a-passo:

Answer 2

Olá,

Bem vamos lá:

4x² - 121=0

a=4 b=0 c=-121

Δ= b² - 4.a.c

Δ= 0² - 4. 4. (-121)

Δ= 0 + 1936

Δ= 1936

(discriminante > 0 = duas raízes distintas.)

x'= -b + √Δ/2a

×'= -0 + 44/8

×'= 5.5

×"=-b - √Δ/2a

x"=- 0 -44/8

x"= -5.5