Question

X²+13x +36=0 como resolvo??

Answer 1

x² + 13x + 36 = 0

Δ= b²- 4ac
Δ= 13² - 4.1.36
Δ= 169 - 144
Δ= 25

x= -b +- √Δ / 2.a
x= - 13 +- √25 / 2.1
x= -13 +- 5 / 2
 x = -13 +5 / 2
 x = -8 / 2 
 x = -4
  
 x = - 13 - 5 / 2
 x = -18 / 2
 x = - 9


 

Answer 2

Equação geral do segundo grau:
a=1
b=13
c=36

x = – b ± √b² – 4×a×c
     2∙a

x= -13 ±  √13² -4×1×36
---------------------------------
2×1

x= -13 ±  √169 -144
----------------------------
2

x= -13 ± √25
-------------------
2

x=-13 ± 5
-------------
2

x'= -13 +5
----------------
2

x'= -8/2
x'=-4

x''= -13-5
---------------
2

x''= -18/2
x''= -9