8x^2-9=223

Solution for 8x^2-9=223 equation:

Simplifying
8x2 + -9 = 223

Reorder the terms:
-9 + 8x2 = 223

Solving
-9 + 8x2 = 223

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 + 8x2 = 223 + 9

Combine like terms: -9 + 9 = 0
0 + 8x2 = 223 + 9
8x2 = 223 + 9

Combine like terms: 223 + 9 = 232
8x2 = 232

Divide each side by '8'.
x2 = 29

Simplifying
x2 = 29

Take the square root of each side:
x = {-5.385164807, 5.385164807}