8x^2+5x=-11

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Solution for 8x^2+5x=-11 equation:


Simplifying
8x2 + 5x = -11

Reorder the terms:
5x + 8x2 = -11

Solving
5x + 8x2 = -11

Solving for variable 'x'.

Reorder the terms:
11 + 5x + 8x2 = -11 + 11

Combine like terms: -11 + 11 = 0
11 + 5x + 8x2 = 0

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

Divide each side by '8'.
1.375 + 0.625x + x2 = 0

Move the constant term to the right:

Add '-1.375' to each side of the equation.
1.375 + 0.625x + -1.375 + x2 = 0 + -1.375

Reorder the terms:
1.375 + -1.375 + 0.625x + x2 = 0 + -1.375

Combine like terms: 1.375 + -1.375 = 0.000
0.000 + 0.625x + x2 = 0 + -1.375
0.625x + x2 = 0 + -1.375

Combine like terms: 0 + -1.375 = -1.375
0.625x + x2 = -1.375

The x term is 0.625x.  Take half its coefficient (0.3125).
Square it (0.09765625) and add it to both sides.

Add '0.09765625' to each side of the equation.
0.625x + 0.09765625 + x2 = -1.375 + 0.09765625

Reorder the terms:
0.09765625 + 0.625x + x2 = -1.375 + 0.09765625

Combine like terms: -1.375 + 0.09765625 = -1.27734375
0.09765625 + 0.625x + x2 = -1.27734375

Factor a perfect square on the left side:
(x + 0.3125)(x + 0.3125) = -1.27734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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