(1)4s^2=-s-1

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Solution for (1)4s^2=-s-1 equation:


Simplifying
(1) * 4s2 = -1s + -1

Multiply 1 * 4
4s2 = -1s + -1

Reorder the terms:
4s2 = -1 + -1s

Solving
4s2 = -1 + -1s

Solving for variable 's'.

Reorder the terms:
1 + s + 4s2 = -1 + -1s + 1 + s

Reorder the terms:
1 + s + 4s2 = -1 + 1 + -1s + s

Combine like terms: -1 + 1 = 0
1 + s + 4s2 = 0 + -1s + s
1 + s + 4s2 = -1s + s

Combine like terms: -1s + s = 0
1 + s + 4s2 = 0

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

Divide each side by '4'.
0.25 + 0.25s + s2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 0.25s + -0.25 + s2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 0.25s + s2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 0.25s + s2 = 0 + -0.25
0.25s + s2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
0.25s + s2 = -0.25

The s term is s.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.25s + 0.25 + s2 = -0.25 + 0.25

Reorder the terms:
0.25 + 0.25s + s2 = -0.25 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.25 + 0.25s + s2 = 0.00

Factor a perfect square on the left side:
(s + 0.5)(s + 0.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(s + 0.5) equal to 0.00 and 0.00.

Subproblem 1

s + 0.5 = 0.00 Simplifying s + 0.5 = 0.00 Reorder the terms: 0.5 + s = 0.00 Solving 0.5 + s = 0.00 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + s = 0.00 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + s = 0.00 + -0.5 s = 0.00 + -0.5 Combine like terms: 0.00 + -0.5 = -0.5 s = -0.5 Simplifying s = -0.5

Subproblem 2

s + 0.5 = 0.00 Simplifying s + 0.5 = 0.00 Reorder the terms: 0.5 + s = 0.00 Solving 0.5 + s = 0.00 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + s = 0.00 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + s = 0.00 + -0.5 s = 0.00 + -0.5 Combine like terms: 0.00 + -0.5 = -0.5 s = -0.5 Simplifying s = -0.5

Solution

The solution to the problem is based on the solutions from the subproblems. s = {-0.5, -0.5}

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