8r^2+3r+2=0

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Solution for 8r^2+3r+2=0 equation:


Simplifying
8r2 + 3r + 2 = 0

Reorder the terms:
2 + 3r + 8r2 = 0

Solving
2 + 3r + 8r2 = 0

Solving for variable 'r'.

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

Divide each side by '8'.
0.25 + 0.375r + r2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 0.375r + -0.25 + r2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 0.375r + r2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 0.375r + r2 = 0 + -0.25
0.375r + r2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
0.375r + r2 = -0.25

The r term is 0.375r.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375r + 0.03515625 + r2 = -0.25 + 0.03515625

Reorder the terms:
0.03515625 + 0.375r + r2 = -0.25 + 0.03515625

Combine like terms: -0.25 + 0.03515625 = -0.21484375
0.03515625 + 0.375r + r2 = -0.21484375

Factor a perfect square on the left side:
(r + 0.1875)(r + 0.1875) = -0.21484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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