4x^2+20x=-49

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Solution for 4x^2+20x=-49 equation:


Simplifying
4x2 + 20x = -49

Reorder the terms:
20x + 4x2 = -49

Solving
20x + 4x2 = -49

Solving for variable 'x'.

Reorder the terms:
49 + 20x + 4x2 = -49 + 49

Combine like terms: -49 + 49 = 0
49 + 20x + 4x2 = 0

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

Divide each side by '4'.
12.25 + 5x + x2 = 0

Move the constant term to the right:

Add '-12.25' to each side of the equation.
12.25 + 5x + -12.25 + x2 = 0 + -12.25

Reorder the terms:
12.25 + -12.25 + 5x + x2 = 0 + -12.25

Combine like terms: 12.25 + -12.25 = 0.00
0.00 + 5x + x2 = 0 + -12.25
5x + x2 = 0 + -12.25

Combine like terms: 0 + -12.25 = -12.25
5x + x2 = -12.25

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -12.25 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -12.25 + 6.25

Combine like terms: -12.25 + 6.25 = -6
6.25 + 5x + x2 = -6

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = -6

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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