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Simplifying
x2 + -800x2 + 20000 = 0
Reorder the terms:
20000 + x2 + -800x2 = 0
Combine like terms: x2 + -800x2 = -799x2
20000 + -799x2 = 0
Solving
20000 + -799x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-20000' to each side of the equation.
20000 + -20000 + -799x2 = 0 + -20000
Combine like terms: 20000 + -20000 = 0
0 + -799x2 = 0 + -20000
-799x2 = 0 + -20000
Combine like terms: 0 + -20000 = -20000
-799x2 = -20000
Divide each side by '-799'.
x2 = 25.03128911
Simplifying
x2 = 25.03128911
Take the square root of each side:
x = {-5.003127933, 5.003127933}
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