2(x^2+2)=18

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Solution for 2(x^2+2)=18 equation:


Simplifying
2(x2 + 2) = 18

Reorder the terms:
2(2 + x2) = 18
(2 * 2 + x2 * 2) = 18
(4 + 2x2) = 18

Solving
4 + 2x2 = 18

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 2x2 = 18 + -4

Combine like terms: 4 + -4 = 0
0 + 2x2 = 18 + -4
2x2 = 18 + -4

Combine like terms: 18 + -4 = 14
2x2 = 14

Divide each side by '2'.
x2 = 7

Simplifying
x2 = 7

Take the square root of each side:
x = {-2.645751311, 2.645751311}

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