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Simplifying
2x2 + 1 = 18
Reorder the terms:
1 + 2x2 = 18
Solving
1 + 2x2 = 18
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1' to each side of the equation.
1 + -1 + 2x2 = 18 + -1
Combine like terms: 1 + -1 = 0
0 + 2x2 = 18 + -1
2x2 = 18 + -1
Combine like terms: 18 + -1 = 17
2x2 = 17
Divide each side by '2'.
x2 = 8.5
Simplifying
x2 = 8.5
Take the square root of each side:
x = {-2.915475947, 2.915475947}
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