2x^2+2x=-7

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


Simplifying
2x2 + 2x = -7

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

Solving
2x + 2x2 = -7

Solving for variable 'x'.

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

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

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

Divide each side by '2'.
3.5 + x + x2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + x + -3.5 + x2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + x + x2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + x + x2 = 0 + -3.5
x + x2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
x + x2 = -3.5

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.
 + 0.25 + x2 = -3.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -3.5 + 0.25

Combine like terms: -3.5 + 0.25 = -3.25
1.25 + x2 = -3.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -3.25

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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