4-x^2=x^2-2x+8

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Solution for 4-x^2=x^2-2x+8 equation:


Simplifying
4 + -1x2 = x2 + -2x + 8

Reorder the terms:
4 + -1x2 = 8 + -2x + x2

Solving
4 + -1x2 = 8 + -2x + x2

Solving for variable 'x'.

Reorder the terms:
4 + -8 + 2x + -1x2 + -1x2 = 8 + -2x + x2 + -8 + 2x + -1x2

Combine like terms: 4 + -8 = -4
-4 + 2x + -1x2 + -1x2 = 8 + -2x + x2 + -8 + 2x + -1x2

Combine like terms: -1x2 + -1x2 = -2x2
-4 + 2x + -2x2 = 8 + -2x + x2 + -8 + 2x + -1x2

Reorder the terms:
-4 + 2x + -2x2 = 8 + -8 + -2x + 2x + x2 + -1x2

Combine like terms: 8 + -8 = 0
-4 + 2x + -2x2 = 0 + -2x + 2x + x2 + -1x2
-4 + 2x + -2x2 = -2x + 2x + x2 + -1x2

Combine like terms: -2x + 2x = 0
-4 + 2x + -2x2 = 0 + x2 + -1x2
-4 + 2x + -2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-4 + 2x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + x + -1x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-2 + x + -1x2)' equal to zero and attempt to solve: Simplifying -2 + x + -1x2 = 0 Solving -2 + x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 2 + -1x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -1x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + -1x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x + x2 = 0 + -2 -1x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 -1x + x2 = -2 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. -1x + 0.25 + x2 = -2 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -2 + 0.25 Combine like terms: -2 + 0.25 = -1.75 0.25 + -1x + x2 = -1.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -1.75 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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