-2b(4b+2)+(9b-8)=0

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Solution for -2b(4b+2)+(9b-8)=0 equation:


Simplifying
-2b(4b + 2) + (9b + -8) = 0

Reorder the terms:
-2b(2 + 4b) + (9b + -8) = 0
(2 * -2b + 4b * -2b) + (9b + -8) = 0
(-4b + -8b2) + (9b + -8) = 0

Reorder the terms:
-4b + -8b2 + (-8 + 9b) = 0

Remove parenthesis around (-8 + 9b)
-4b + -8b2 + -8 + 9b = 0

Reorder the terms:
-8 + -4b + 9b + -8b2 = 0

Combine like terms: -4b + 9b = 5b
-8 + 5b + -8b2 = 0

Solving
-8 + 5b + -8b2 = 0

Solving for variable 'b'.

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

Divide each side by '-8'.
1 + -0.625b + b2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -0.625b + -1 + b2 = 0 + -1

Reorder the terms:
1 + -1 + -0.625b + b2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -0.625b + b2 = 0 + -1
-0.625b + b2 = 0 + -1

Combine like terms: 0 + -1 = -1
-0.625b + b2 = -1

The b term is -0.625b.  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.
-0.625b + 0.09765625 + b2 = -1 + 0.09765625

Reorder the terms:
0.09765625 + -0.625b + b2 = -1 + 0.09765625

Combine like terms: -1 + 0.09765625 = -0.90234375
0.09765625 + -0.625b + b2 = -0.90234375

Factor a perfect square on the left side:
(b + -0.3125)(b + -0.3125) = -0.90234375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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