2x^2-5=18

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Solution for 2x^2-5=18 equation: 


Simplifying
2x2 + -5 = 18

Reorder the terms:
-5 + 2x2 = 18

Solving
-5 + 2x2 = 18

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 2x2 = 18 + 5

Combine like terms: -5 + 5 = 0
0 + 2x2 = 18 + 5
2x2 = 18 + 5

Combine like terms: 18 + 5 = 23
2x2 = 23

Divide each side by '2'.
x2 = 11.5

Simplifying
x2 = 11.5

Take the square root of each side:
x = {-3.391164992, 3.391164992}

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