8g^2-7g-6=0

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Solution for 8g^2-7g-6=0 equation:


Simplifying
8g2 + -7g + -6 = 0

Reorder the terms:
-6 + -7g + 8g2 = 0

Solving
-6 + -7g + 8g2 = 0

Solving for variable 'g'.

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

Divide each side by '8'.
-0.75 + -0.875g + g2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + -0.875g + 0.75 + g2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + -0.875g + g2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + -0.875g + g2 = 0 + 0.75
-0.875g + g2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
-0.875g + g2 = 0.75

The g term is -0.875g.  Take half its coefficient (-0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
-0.875g + 0.19140625 + g2 = 0.75 + 0.19140625

Reorder the terms:
0.19140625 + -0.875g + g2 = 0.75 + 0.19140625

Combine like terms: 0.75 + 0.19140625 = 0.94140625
0.19140625 + -0.875g + g2 = 0.94140625

Factor a perfect square on the left side:
(g + -0.4375)(g + -0.4375) = 0.94140625

Calculate the square root of the right side: 0.970260919

Break this problem into two subproblems by setting 
(g + -0.4375) equal to 0.970260919 and -0.970260919.

Subproblem 1

g + -0.4375 = 0.970260919 Simplifying g + -0.4375 = 0.970260919 Reorder the terms: -0.4375 + g = 0.970260919 Solving -0.4375 + g = 0.970260919 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + g = 0.970260919 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + g = 0.970260919 + 0.4375 g = 0.970260919 + 0.4375 Combine like terms: 0.970260919 + 0.4375 = 1.407760919 g = 1.407760919 Simplifying g = 1.407760919

Subproblem 2

g + -0.4375 = -0.970260919 Simplifying g + -0.4375 = -0.970260919 Reorder the terms: -0.4375 + g = -0.970260919 Solving -0.4375 + g = -0.970260919 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + g = -0.970260919 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + g = -0.970260919 + 0.4375 g = -0.970260919 + 0.4375 Combine like terms: -0.970260919 + 0.4375 = -0.532760919 g = -0.532760919 Simplifying g = -0.532760919

Solution

The solution to the problem is based on the solutions from the subproblems. g = {1.407760919, -0.532760919}

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