s^2-9s-3=0

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


Simplifying
s2 + -9s + -3 = 0

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

Solving
-3 + -9s + s2 = 0

Solving for variable 's'.

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -9s + 3 + s2 = 0 + 3

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

Combine like terms: -3 + 3 = 0
0 + -9s + s2 = 0 + 3
-9s + s2 = 0 + 3

Combine like terms: 0 + 3 = 3
-9s + s2 = 3

The s term is -9s.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9s + 20.25 + s2 = 3 + 20.25

Reorder the terms:
20.25 + -9s + s2 = 3 + 20.25

Combine like terms: 3 + 20.25 = 23.25
20.25 + -9s + s2 = 23.25

Factor a perfect square on the left side:
(s + -4.5)(s + -4.5) = 23.25

Calculate the square root of the right side: 4.82182538

Break this problem into two subproblems by setting 
(s + -4.5) equal to 4.82182538 and -4.82182538.

Subproblem 1

s + -4.5 = 4.82182538 Simplifying s + -4.5 = 4.82182538 Reorder the terms: -4.5 + s = 4.82182538 Solving -4.5 + s = 4.82182538 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + s = 4.82182538 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + s = 4.82182538 + 4.5 s = 4.82182538 + 4.5 Combine like terms: 4.82182538 + 4.5 = 9.32182538 s = 9.32182538 Simplifying s = 9.32182538

Subproblem 2

s + -4.5 = -4.82182538 Simplifying s + -4.5 = -4.82182538 Reorder the terms: -4.5 + s = -4.82182538 Solving -4.5 + s = -4.82182538 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + s = -4.82182538 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + s = -4.82182538 + 4.5 s = -4.82182538 + 4.5 Combine like terms: -4.82182538 + 4.5 = -0.32182538 s = -0.32182538 Simplifying s = -0.32182538

Solution

The solution to the problem is based on the solutions from the subproblems. s = {9.32182538, -0.32182538}

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