5x^2=-12x-16

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Solution for 5x^2=-12x-16 equation:


Simplifying
5x2 = -12x + -16

Reorder the terms:
5x2 = -16 + -12x

Solving
5x2 = -16 + -12x

Solving for variable 'x'.

Reorder the terms:
16 + 12x + 5x2 = -16 + -12x + 16 + 12x

Reorder the terms:
16 + 12x + 5x2 = -16 + 16 + -12x + 12x

Combine like terms: -16 + 16 = 0
16 + 12x + 5x2 = 0 + -12x + 12x
16 + 12x + 5x2 = -12x + 12x

Combine like terms: -12x + 12x = 0
16 + 12x + 5x2 = 0

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

Divide each side by '5'.
3.2 + 2.4x + x2 = 0

Move the constant term to the right:

Add '-3.2' to each side of the equation.
3.2 + 2.4x + -3.2 + x2 = 0 + -3.2

Reorder the terms:
3.2 + -3.2 + 2.4x + x2 = 0 + -3.2

Combine like terms: 3.2 + -3.2 = 0.0
0.0 + 2.4x + x2 = 0 + -3.2
2.4x + x2 = 0 + -3.2

Combine like terms: 0 + -3.2 = -3.2
2.4x + x2 = -3.2

The x term is 2.4x.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4x + 1.44 + x2 = -3.2 + 1.44

Reorder the terms:
1.44 + 2.4x + x2 = -3.2 + 1.44

Combine like terms: -3.2 + 1.44 = -1.76
1.44 + 2.4x + x2 = -1.76

Factor a perfect square on the left side:
(x + 1.2)(x + 1.2) = -1.76

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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