x^2+9=400

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Solution for x^2+9=400 equation: 


Simplifying
x2 + 9 = 400

Reorder the terms:
9 + x2 = 400

Solving
9 + x2 = 400

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + x2 = 400 + -9

Combine like terms: 9 + -9 = 0
0 + x2 = 400 + -9
x2 = 400 + -9

Combine like terms: 400 + -9 = 391
x2 = 391

Simplifying
x2 = 391

Take the square root of each side:
x = {-19.773719933, 19.773719933}

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