Question

X ao quadrado + 2x +x + 2 =0

Answer 1

x² + 2x + x + 2 = 0
x² + 3x + 2 = 0
Δ = b² - 4.a.c
Δ = 3² - 4.1.2
Δ = 9 - 8
Δ = 1

x' = -b + √Δ
-----------------
2.a

-3 + √Δ
----------
2.1

-3 + √1
---------
2

-3 + 1 ÷ 2 = -1


x'' = -b - √Δ
-----------------
2.a

-3 - √Δ
-----------
2.1

-3 - √1
---------
2

-3 - 1 ÷ 2 = -2


Espero que esteja certo!!!

Answer 2

x² + 2x +x + 2 = 0
x² + 3x + 2 = 0
a = 1; b = 3; c = 2
Δ = b² - 4ac
Δ = 3² - 4.1.2
Δ = 9 - 8
Δ = 1

x = - b +/- √Δ   = - 3 +/- √1 
      --------------    --------------
              2a             2.1

x = - 3 + 1   = - 2/2 = - 1
      ----------
           2

x = - 3 - 1    = - 4/2 = - 2
      ----------
           2

R.: x = - 1 ; x = - 2