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Simplifying
0 = -1x2 + 1 + 20
Reorder the terms:
0 = 1 + 20 + -1x2
Combine like terms: 1 + 20 = 21
0 = 21 + -1x2
Solving
0 = 21 + -1x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add 'x2' to each side of the equation.
0 + x2 = 21 + -1x2 + x2
Remove the zero:
x2 = 21 + -1x2 + x2
Combine like terms: -1x2 + x2 = 0
x2 = 21 + 0
x2 = 21
Simplifying
x2 = 21
Take the square root of each side:
x = {-4.582575695, 4.582575695}
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