y^2-15=0

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Solution for y^2-15=0 equation: 


Simplifying
y2 + -15 = 0

Reorder the terms:
-15 + y2 = 0

Solving
-15 + y2 = 0

Solving for variable 'y'.

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

Add '15' to each side of the equation.
-15 + 15 + y2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + y2 = 0 + 15
y2 = 0 + 15

Combine like terms: 0 + 15 = 15
y2 = 15

Simplifying
y2 = 15

Take the square root of each side:
y = {-3.872983346, 3.872983346}

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