x^2-21=17

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Solution for x^2-21=17 equation: 


Simplifying
x2 + -21 = 17

Reorder the terms:
-21 + x2 = 17

Solving
-21 + x2 = 17

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + x2 = 17 + 21

Combine like terms: -21 + 21 = 0
0 + x2 = 17 + 21
x2 = 17 + 21

Combine like terms: 17 + 21 = 38
x2 = 38

Simplifying
x2 = 38

Take the square root of each side:
x = {-6.164414003, 6.164414003}

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