y^2+4-9=0

Solution for y^2+4-9=0 equation:

Simplifying
y2 + 4 + -9 = 0

Reorder the terms:
4 + -9 + y2 = 0

Combine like terms: 4 + -9 = -5
-5 + y2 = 0

Solving
-5 + y2 = 0

Solving for variable 'y'.

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

Add '5' to each side of the equation.
-5 + 5 + y2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + y2 = 0 + 5
y2 = 0 + 5

Combine like terms: 0 + 5 = 5
y2 = 5

Simplifying
y2 = 5

Take the square root of each side:
y = {-2.236067978, 2.236067978}