9x^2+12x=-4x^2-4

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Solution for 9x^2+12x=-4x^2-4 equation:


Simplifying
9x2 + 12x = -4x2 + -4

Reorder the terms:
12x + 9x2 = -4x2 + -4

Reorder the terms:
12x + 9x2 = -4 + -4x2

Solving
12x + 9x2 = -4 + -4x2

Solving for variable 'x'.

Reorder the terms:
4 + 12x + 9x2 + 4x2 = -4 + -4x2 + 4 + 4x2

Combine like terms: 9x2 + 4x2 = 13x2
4 + 12x + 13x2 = -4 + -4x2 + 4 + 4x2

Reorder the terms:
4 + 12x + 13x2 = -4 + 4 + -4x2 + 4x2

Combine like terms: -4 + 4 = 0
4 + 12x + 13x2 = 0 + -4x2 + 4x2
4 + 12x + 13x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
4 + 12x + 13x2 = 0

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

Divide each side by '13'.
0.3076923077 + 0.9230769231x + x2 = 0

Move the constant term to the right:

Add '-0.3076923077' to each side of the equation.
0.3076923077 + 0.9230769231x + -0.3076923077 + x2 = 0 + -0.3076923077

Reorder the terms:
0.3076923077 + -0.3076923077 + 0.9230769231x + x2 = 0 + -0.3076923077

Combine like terms: 0.3076923077 + -0.3076923077 = 0.0000000000
0.0000000000 + 0.9230769231x + x2 = 0 + -0.3076923077
0.9230769231x + x2 = 0 + -0.3076923077

Combine like terms: 0 + -0.3076923077 = -0.3076923077
0.9230769231x + x2 = -0.3076923077

The x term is 0.9230769231x.  Take half its coefficient (0.4615384616).
Square it (0.2130177515) and add it to both sides.

Add '0.2130177515' to each side of the equation.
0.9230769231x + 0.2130177515 + x2 = -0.3076923077 + 0.2130177515

Reorder the terms:
0.2130177515 + 0.9230769231x + x2 = -0.3076923077 + 0.2130177515

Combine like terms: -0.3076923077 + 0.2130177515 = -0.0946745562
0.2130177515 + 0.9230769231x + x2 = -0.0946745562

Factor a perfect square on the left side:
(x + 0.4615384616)(x + 0.4615384616) = -0.0946745562

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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