X^2-3=87

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Solution for X^2-3=87 equation: 


Simplifying
X2 + -3 = 87

Reorder the terms:
-3 + X2 = 87

Solving
-3 + X2 = 87

Solving for variable 'X'.

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

Add '3' to each side of the equation.
-3 + 3 + X2 = 87 + 3

Combine like terms: -3 + 3 = 0
0 + X2 = 87 + 3
X2 = 87 + 3

Combine like terms: 87 + 3 = 90
X2 = 90

Simplifying
X2 = 90

Take the square root of each side:
X = {-9.486832981, 9.486832981}

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