16r^2+r+5=0

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Solution for 16r^2+r+5=0 equation:


Simplifying
16r2 + r + 5 = 0

Reorder the terms:
5 + r + 16r2 = 0

Solving
5 + r + 16r2 = 0

Solving for variable 'r'.

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

Divide each side by '16'.
0.3125 + 0.0625r + r2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + 0.0625r + -0.3125 + r2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + 0.0625r + r2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + 0.0625r + r2 = 0 + -0.3125
0.0625r + r2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
0.0625r + r2 = -0.3125

The r term is r.  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.
0.0625r + 0.25 + r2 = -0.3125 + 0.25

Reorder the terms:
0.25 + 0.0625r + r2 = -0.3125 + 0.25

Combine like terms: -0.3125 + 0.25 = -0.0625
0.25 + 0.0625r + r2 = -0.0625

Factor a perfect square on the left side:
(r + 0.5)(r + 0.5) = -0.0625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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