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Simplifying
[2x] = x2 + 2x + -5
Reorder the terms:
[2x] = -5 + 2x + x2
Add '[-2x]' to each side of the equation.
[2x] + [-2x] = -5 + 2x + [-2x] + x2
Combine like terms: [2x] + [-2x] = 0
0 = -5 + 2x + [-2x] + x2
Combine like terms: 2x + [-2x] = 0
0 = -5 + 0 + x2
0 = -5 + x2
Solving
0 = -5 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
0 + -1x2 = -5 + x2 + -1x2
Remove the zero:
-1x2 = -5 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
-1x2 = -5 + 0
-1x2 = -5
Divide each side by '-1'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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