45s^2-17s-15=0

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Solution for 45s^2-17s-15=0 equation:


Simplifying
45s2 + -17s + -15 = 0

Reorder the terms:
-15 + -17s + 45s2 = 0

Solving
-15 + -17s + 45s2 = 0

Solving for variable 's'.

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

Divide each side by '45'.
-0.3333333333 + -0.3777777778s + s2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.3777777778s + 0.3333333333 + s2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.3777777778s + s2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.3777777778s + s2 = 0 + 0.3333333333
-0.3777777778s + s2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.3777777778s + s2 = 0.3333333333

The s term is -0.3777777778s.  Take half its coefficient (-0.1888888889).
Square it (0.03567901235) and add it to both sides.

Add '0.03567901235' to each side of the equation.
-0.3777777778s + 0.03567901235 + s2 = 0.3333333333 + 0.03567901235

Reorder the terms:
0.03567901235 + -0.3777777778s + s2 = 0.3333333333 + 0.03567901235

Combine like terms: 0.3333333333 + 0.03567901235 = 0.36901234565
0.03567901235 + -0.3777777778s + s2 = 0.36901234565

Factor a perfect square on the left side:
(s + -0.1888888889)(s + -0.1888888889) = 0.36901234565

Calculate the square root of the right side: 0.607463864

Break this problem into two subproblems by setting 
(s + -0.1888888889) equal to 0.607463864 and -0.607463864.

Subproblem 1

s + -0.1888888889 = 0.607463864 Simplifying s + -0.1888888889 = 0.607463864 Reorder the terms: -0.1888888889 + s = 0.607463864 Solving -0.1888888889 + s = 0.607463864 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.1888888889' to each side of the equation. -0.1888888889 + 0.1888888889 + s = 0.607463864 + 0.1888888889 Combine like terms: -0.1888888889 + 0.1888888889 = 0.0000000000 0.0000000000 + s = 0.607463864 + 0.1888888889 s = 0.607463864 + 0.1888888889 Combine like terms: 0.607463864 + 0.1888888889 = 0.7963527529 s = 0.7963527529 Simplifying s = 0.7963527529

Subproblem 2

s + -0.1888888889 = -0.607463864 Simplifying s + -0.1888888889 = -0.607463864 Reorder the terms: -0.1888888889 + s = -0.607463864 Solving -0.1888888889 + s = -0.607463864 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.1888888889' to each side of the equation. -0.1888888889 + 0.1888888889 + s = -0.607463864 + 0.1888888889 Combine like terms: -0.1888888889 + 0.1888888889 = 0.0000000000 0.0000000000 + s = -0.607463864 + 0.1888888889 s = -0.607463864 + 0.1888888889 Combine like terms: -0.607463864 + 0.1888888889 = -0.4185749751 s = -0.4185749751 Simplifying s = -0.4185749751

Solution

The solution to the problem is based on the solutions from the subproblems. s = {0.7963527529, -0.4185749751}

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