x*x+18-100-300=0

Solution for x*x+18-100-300=0 equation:

Simplifying
x * x + 18 + -100 + -300 = 0

Multiply x * x
x2 + 18 + -100 + -300 = 0

Reorder the terms:
18 + -100 + -300 + x2 = 0

Combine like terms: 18 + -100 = -82
-82 + -300 + x2 = 0

Combine like terms: -82 + -300 = -382
-382 + x2 = 0

Solving
-382 + x2 = 0

Solving for variable 'x'.

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

Add '382' to each side of the equation.
-382 + 382 + x2 = 0 + 382

Combine like terms: -382 + 382 = 0
0 + x2 = 0 + 382
x2 = 0 + 382

Combine like terms: 0 + 382 = 382
x2 = 382

Simplifying
x2 = 382

Take the square root of each side:
x = {-19.544820286, 19.544820286}