s^2+7s=14

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Solution for s^2+7s=14 equation:


Simplifying
s2 + 7s = 14

Reorder the terms:
7s + s2 = 14

Solving
7s + s2 = 14

Solving for variable 's'.

Reorder the terms:
-14 + 7s + s2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + 7s + s2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 7s + 14 + s2 = 0 + 14

Reorder the terms:
-14 + 14 + 7s + s2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 7s + s2 = 0 + 14
7s + s2 = 0 + 14

Combine like terms: 0 + 14 = 14
7s + s2 = 14

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 = 14 + 12.25

Reorder the terms:
12.25 + 7s + s2 = 14 + 12.25

Combine like terms: 14 + 12.25 = 26.25
12.25 + 7s + s2 = 26.25

Factor a perfect square on the left side:
(s + 3.5)(s + 3.5) = 26.25

Calculate the square root of the right side: 5.123475383

Break this problem into two subproblems by setting 
(s + 3.5) equal to 5.123475383 and -5.123475383.

Subproblem 1

s + 3.5 = 5.123475383 Simplifying s + 3.5 = 5.123475383 Reorder the terms: 3.5 + s = 5.123475383 Solving 3.5 + s = 5.123475383 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 = 5.123475383 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + s = 5.123475383 + -3.5 s = 5.123475383 + -3.5 Combine like terms: 5.123475383 + -3.5 = 1.623475383 s = 1.623475383 Simplifying s = 1.623475383

Subproblem 2

s + 3.5 = -5.123475383 Simplifying s + 3.5 = -5.123475383 Reorder the terms: 3.5 + s = -5.123475383 Solving 3.5 + s = -5.123475383 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 = -5.123475383 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + s = -5.123475383 + -3.5 s = -5.123475383 + -3.5 Combine like terms: -5.123475383 + -3.5 = -8.623475383 s = -8.623475383 Simplifying s = -8.623475383

Solution

The solution to the problem is based on the solutions from the subproblems. s = {1.623475383, -8.623475383}

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