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Simplifying
4 + x2 + x2 = 9
Combine like terms: x2 + x2 = 2x2
4 + 2x2 = 9
Solving
4 + 2x2 = 9
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 = 9 + -4
Combine like terms: 4 + -4 = 0
0 + 2x2 = 9 + -4
2x2 = 9 + -4
Combine like terms: 9 + -4 = 5
2x2 = 5
Divide each side by '2'.
x2 = 2.5
Simplifying
x2 = 2.5
Take the square root of each side:
x = {-1.58113883, 1.58113883}
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