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Simplifying
x2 + 1.6x2 = 361
Combine like terms: x2 + 1.6x2 = 2.6x2
2.6x2 = 361
Solving
2.6x2 = 361
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '2.6'.
x2 = 138.8461538
Simplifying
x2 = 138.8461538
Take the square root of each side:
x = {-11.783299784, 11.783299784}
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