y^2-1=28

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Solution for y^2-1=28 equation: 


Simplifying
y2 + -1 = 28

Reorder the terms:
-1 + y2 = 28

Solving
-1 + y2 = 28

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + y2 = 28 + 1

Combine like terms: -1 + 1 = 0
0 + y2 = 28 + 1
y2 = 28 + 1

Combine like terms: 28 + 1 = 29
y2 = 29

Simplifying
y2 = 29

Take the square root of each side:
y = {-5.385164807, 5.385164807}

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