a^2+1-4=0

Solution for a^2+1-4=0 equation:

Simplifying
a2 + 1 + -4 = 0

Reorder the terms:
1 + -4 + a2 = 0

Combine like terms: 1 + -4 = -3
-3 + a2 = 0

Solving
-3 + a2 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + a2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + a2 = 0 + 3
a2 = 0 + 3

Combine like terms: 0 + 3 = 3
a2 = 3

Simplifying
a2 = 3

Take the square root of each side:
a = {-1.732050808, 1.732050808}