8-x^2=20+x

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Solution for 8-x^2=20+x equation:


Simplifying
8 + -1x2 = 20 + x

Solving
8 + -1x2 = 20 + x

Solving for variable 'x'.

Reorder the terms:
8 + -20 + -1x + -1x2 = 20 + x + -20 + -1x

Combine like terms: 8 + -20 = -12
-12 + -1x + -1x2 = 20 + x + -20 + -1x

Reorder the terms:
-12 + -1x + -1x2 = 20 + -20 + x + -1x

Combine like terms: 20 + -20 = 0
-12 + -1x + -1x2 = 0 + x + -1x
-12 + -1x + -1x2 = x + -1x

Combine like terms: x + -1x = 0
-12 + -1x + -1x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(12 + x + x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(12 + x + x2)' equal to zero and attempt to solve: Simplifying 12 + x + x2 = 0 Solving 12 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-12' to each side of the equation. 12 + x + -12 + x2 = 0 + -12 Reorder the terms: 12 + -12 + x + x2 = 0 + -12 Combine like terms: 12 + -12 = 0 0 + x + x2 = 0 + -12 x + x2 = 0 + -12 Combine like terms: 0 + -12 = -12 x + x2 = -12 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. x + 0.25 + x2 = -12 + 0.25 Reorder the terms: 0.25 + x + x2 = -12 + 0.25 Combine like terms: -12 + 0.25 = -11.75 0.25 + x + x2 = -11.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -11.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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