-s-2=-7s^2

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Solution for -s-2=-7s^2 equation:


Simplifying
-1s + -2 = -7s2

Reorder the terms:
-2 + -1s = -7s2

Solving
-2 + -1s = -7s2

Solving for variable 's'.

Combine like terms: -7s2 + 7s2 = 0
-2 + -1s + 7s2 = 0

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

Divide each side by '7'.
-0.2857142857 + -0.1428571429s + s2 = 0

Move the constant term to the right:

Add '0.2857142857' to each side of the equation.
-0.2857142857 + -0.1428571429s + 0.2857142857 + s2 = 0 + 0.2857142857

Reorder the terms:
-0.2857142857 + 0.2857142857 + -0.1428571429s + s2 = 0 + 0.2857142857

Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000
0.0000000000 + -0.1428571429s + s2 = 0 + 0.2857142857
-0.1428571429s + s2 = 0 + 0.2857142857

Combine like terms: 0 + 0.2857142857 = 0.2857142857
-0.1428571429s + s2 = 0.2857142857

The s term is -0.1428571429s.  Take half its coefficient (-0.07142857145).
Square it (0.005102040819) and add it to both sides.

Add '0.005102040819' to each side of the equation.
-0.1428571429s + 0.005102040819 + s2 = 0.2857142857 + 0.005102040819

Reorder the terms:
0.005102040819 + -0.1428571429s + s2 = 0.2857142857 + 0.005102040819

Combine like terms: 0.2857142857 + 0.005102040819 = 0.290816326519
0.005102040819 + -0.1428571429s + s2 = 0.290816326519

Factor a perfect square on the left side:
(s + -0.07142857145)(s + -0.07142857145) = 0.290816326519

Calculate the square root of the right side: 0.539273888

Break this problem into two subproblems by setting 
(s + -0.07142857145) equal to 0.539273888 and -0.539273888.

Subproblem 1

s + -0.07142857145 = 0.539273888 Simplifying s + -0.07142857145 = 0.539273888 Reorder the terms: -0.07142857145 + s = 0.539273888 Solving -0.07142857145 + s = 0.539273888 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + s = 0.539273888 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + s = 0.539273888 + 0.07142857145 s = 0.539273888 + 0.07142857145 Combine like terms: 0.539273888 + 0.07142857145 = 0.61070245945 s = 0.61070245945 Simplifying s = 0.61070245945

Subproblem 2

s + -0.07142857145 = -0.539273888 Simplifying s + -0.07142857145 = -0.539273888 Reorder the terms: -0.07142857145 + s = -0.539273888 Solving -0.07142857145 + s = -0.539273888 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + s = -0.539273888 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + s = -0.539273888 + 0.07142857145 s = -0.539273888 + 0.07142857145 Combine like terms: -0.539273888 + 0.07142857145 = -0.46784531655 s = -0.46784531655 Simplifying s = -0.46784531655

Solution

The solution to the problem is based on the solutions from the subproblems. s = {0.61070245945, -0.46784531655}

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