x-7=x^2+1

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Solution for x-7=x^2+1 equation:


Simplifying
x + -7 = x2 + 1

Reorder the terms:
-7 + x = x2 + 1

Reorder the terms:
-7 + x = 1 + x2

Solving
-7 + x = 1 + x2

Solving for variable 'x'.

Reorder the terms:
-7 + -1 + x + -1x2 = 1 + x2 + -1 + -1x2

Combine like terms: -7 + -1 = -8
-8 + x + -1x2 = 1 + x2 + -1 + -1x2

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

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
8 + -1x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -1x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -1x + x2 = 0 + -8

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

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

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 = -8 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -8 + 0.25

Combine like terms: -8 + 0.25 = -7.75
0.25 + -1x + x2 = -7.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -7.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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