s^2-7s-3=0

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Solution for s^2-7s-3=0 equation:


Simplifying
s2 + -7s + -3 = 0

Reorder the terms:
-3 + -7s + s2 = 0

Solving
-3 + -7s + 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 + -7s + 3 + s2 = 0 + 3

Reorder the terms:
-3 + 3 + -7s + s2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -7s + s2 = 0 + 3
-7s + s2 = 0 + 3

Combine like terms: 0 + 3 = 3
-7s + s2 = 3

The s term is -7s.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7s + 12.25 + s2 = 3 + 12.25

Reorder the terms:
12.25 + -7s + s2 = 3 + 12.25

Combine like terms: 3 + 12.25 = 15.25
12.25 + -7s + s2 = 15.25

Factor a perfect square on the left side:
(s + -3.5)(s + -3.5) = 15.25

Calculate the square root of the right side: 3.905124838

Break this problem into two subproblems by setting 
(s + -3.5) equal to 3.905124838 and -3.905124838.

Subproblem 1

s + -3.5 = 3.905124838 Simplifying s + -3.5 = 3.905124838 Reorder the terms: -3.5 + s = 3.905124838 Solving -3.5 + s = 3.905124838 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + s = 3.905124838 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + s = 3.905124838 + 3.5 s = 3.905124838 + 3.5 Combine like terms: 3.905124838 + 3.5 = 7.405124838 s = 7.405124838 Simplifying s = 7.405124838

Subproblem 2

s + -3.5 = -3.905124838 Simplifying s + -3.5 = -3.905124838 Reorder the terms: -3.5 + s = -3.905124838 Solving -3.5 + s = -3.905124838 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + s = -3.905124838 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + s = -3.905124838 + 3.5 s = -3.905124838 + 3.5 Combine like terms: -3.905124838 + 3.5 = -0.405124838 s = -0.405124838 Simplifying s = -0.405124838

Solution

The solution to the problem is based on the solutions from the subproblems. s = {7.405124838, -0.405124838}

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