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Simplifying
x2 + x2 + 9 = 169
Reorder the terms:
9 + x2 + x2 = 169
Combine like terms: x2 + x2 = 2x2
9 + 2x2 = 169
Solving
9 + 2x2 = 169
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 + 2x2 = 169 + -9
Combine like terms: 9 + -9 = 0
0 + 2x2 = 169 + -9
2x2 = 169 + -9
Combine like terms: 169 + -9 = 160
2x2 = 160
Divide each side by '2'.
x2 = 80
Simplifying
x2 = 80
Take the square root of each side:
x = {-8.94427191, 8.94427191}
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