-8s^2+9s+6=0

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Solution for -8s^2+9s+6=0 equation:


Simplifying
-8s2 + 9s + 6 = 0

Reorder the terms:
6 + 9s + -8s2 = 0

Solving
6 + 9s + -8s2 = 0

Solving for variable 's'.

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

Divide each side by '-8'.
-0.75 + -1.125s + s2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + -1.125s + 0.75 + s2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + -1.125s + s2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + -1.125s + s2 = 0 + 0.75
-1.125s + s2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
-1.125s + s2 = 0.75

The s term is -1.125s.  Take half its coefficient (-0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
-1.125s + 0.31640625 + s2 = 0.75 + 0.31640625

Reorder the terms:
0.31640625 + -1.125s + s2 = 0.75 + 0.31640625

Combine like terms: 0.75 + 0.31640625 = 1.06640625
0.31640625 + -1.125s + s2 = 1.06640625

Factor a perfect square on the left side:
(s + -0.5625)(s + -0.5625) = 1.06640625

Calculate the square root of the right side: 1.032669478

Break this problem into two subproblems by setting 
(s + -0.5625) equal to 1.032669478 and -1.032669478.

Subproblem 1

s + -0.5625 = 1.032669478 Simplifying s + -0.5625 = 1.032669478 Reorder the terms: -0.5625 + s = 1.032669478 Solving -0.5625 + s = 1.032669478 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + s = 1.032669478 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + s = 1.032669478 + 0.5625 s = 1.032669478 + 0.5625 Combine like terms: 1.032669478 + 0.5625 = 1.595169478 s = 1.595169478 Simplifying s = 1.595169478

Subproblem 2

s + -0.5625 = -1.032669478 Simplifying s + -0.5625 = -1.032669478 Reorder the terms: -0.5625 + s = -1.032669478 Solving -0.5625 + s = -1.032669478 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + s = -1.032669478 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + s = -1.032669478 + 0.5625 s = -1.032669478 + 0.5625 Combine like terms: -1.032669478 + 0.5625 = -0.470169478 s = -0.470169478 Simplifying s = -0.470169478

Solution

The solution to the problem is based on the solutions from the subproblems. s = {1.595169478, -0.470169478}

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