x^2+2x-8=2x^2-1

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Solution for x^2+2x-8=2x^2-1 equation:


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

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

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

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

Solving for variable 'x'.

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

Combine like terms: -8 + 1 = -7
-7 + 2x + x2 + -2x2 = -1 + 2x2 + 1 + -2x2

Combine like terms: x2 + -2x2 = -1x2
-7 + 2x + -1x2 = -1 + 2x2 + 1 + -2x2

Reorder the terms:
-7 + 2x + -1x2 = -1 + 1 + 2x2 + -2x2

Combine like terms: -1 + 1 = 0
-7 + 2x + -1x2 = 0 + 2x2 + -2x2
-7 + 2x + -1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-7 + 2x + -1x2 = 0

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

Divide each side by '-1'.
7 + -2x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -2x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -2x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -2x + x2 = 0 + -7
-2x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-2x + x2 = -7

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -7 + 1

Reorder the terms:
1 + -2x + x2 = -7 + 1

Combine like terms: -7 + 1 = -6
1 + -2x + x2 = -6

Factor a perfect square on the left side:
(x + -1)(x + -1) = -6

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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