Question 321869
(x^2-5)+4=0
(x^2-5)+4=0
       -4=0-4
x^2-5=-4
x^2-5=-4
   +5=-4+5
x^2= 1
x= ±1
solution: x= ±1

*****check solution*****
x= ±1
x^2=1
(x^2-5)+4=0
(1^2-5)+4=0
(1-5)+4=0
-4+4=0
0=0