16x^2+8x=-5

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Solution for 16x^2+8x=-5 equation:


Simplifying
16x2 + 8x = -5

Reorder the terms:
8x + 16x2 = -5

Solving
8x + 16x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + 8x + 16x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 8x + 16x2 = 0

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

Divide each side by '16'.
0.3125 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + 0.5x + -0.3125 + x2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + 0.5x + x2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + 0.5x + x2 = 0 + -0.3125
0.5x + x2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
0.5x + x2 = -0.3125

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = -0.3125 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = -0.3125 + 0.0625

Combine like terms: -0.3125 + 0.0625 = -0.25
0.0625 + 0.5x + x2 = -0.25

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = -0.25

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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