y^2-84=57

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Solution for y^2-84=57 equation: 


Simplifying
y2 + -84 = 57

Reorder the terms:
-84 + y2 = 57

Solving
-84 + y2 = 57

Solving for variable 'y'.

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

Add '84' to each side of the equation.
-84 + 84 + y2 = 57 + 84

Combine like terms: -84 + 84 = 0
0 + y2 = 57 + 84
y2 = 57 + 84

Combine like terms: 57 + 84 = 141
y2 = 141

Simplifying
y2 = 141

Take the square root of each side:
y = {-11.874342087, 11.874342087}

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