-8s^2-3s+9=0

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Solution for -8s^2-3s+9=0 equation:


Simplifying
-8s2 + -3s + 9 = 0

Reorder the terms:
9 + -3s + -8s2 = 0

Solving
9 + -3s + -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'.
-1.125 + 0.375s + s2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + 0.375s + 1.125 + s2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + 0.375s + s2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + 0.375s + s2 = 0 + 1.125
0.375s + s2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
0.375s + s2 = 1.125

The s term is 0.375s.  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.
0.375s + 0.03515625 + s2 = 1.125 + 0.03515625

Reorder the terms:
0.03515625 + 0.375s + s2 = 1.125 + 0.03515625

Combine like terms: 1.125 + 0.03515625 = 1.16015625
0.03515625 + 0.375s + s2 = 1.16015625

Factor a perfect square on the left side:
(s + 0.1875)(s + 0.1875) = 1.16015625

Calculate the square root of the right side: 1.077105496

Break this problem into two subproblems by setting 
(s + 0.1875) equal to 1.077105496 and -1.077105496.

Subproblem 1

s + 0.1875 = 1.077105496 Simplifying s + 0.1875 = 1.077105496 Reorder the terms: 0.1875 + s = 1.077105496 Solving 0.1875 + s = 1.077105496 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + s = 1.077105496 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + s = 1.077105496 + -0.1875 s = 1.077105496 + -0.1875 Combine like terms: 1.077105496 + -0.1875 = 0.889605496 s = 0.889605496 Simplifying s = 0.889605496

Subproblem 2

s + 0.1875 = -1.077105496 Simplifying s + 0.1875 = -1.077105496 Reorder the terms: 0.1875 + s = -1.077105496 Solving 0.1875 + s = -1.077105496 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + s = -1.077105496 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + s = -1.077105496 + -0.1875 s = -1.077105496 + -0.1875 Combine like terms: -1.077105496 + -0.1875 = -1.264605496 s = -1.264605496 Simplifying s = -1.264605496

Solution

The solution to the problem is based on the solutions from the subproblems. s = {0.889605496, -1.264605496}

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