0=s^2+13s+40

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Solution for 0=s^2+13s+40 equation:


Simplifying
0 = s2 + 13s + 40

Reorder the terms:
0 = 40 + 13s + s2

Solving
0 = 40 + 13s + s2

Solving for variable 's'.

Combine like terms: 0 + -40 = -40
-40 + -13s + -1s2 = 40 + 13s + s2 + -40 + -13s + -1s2

Reorder the terms:
-40 + -13s + -1s2 = 40 + -40 + 13s + -13s + s2 + -1s2

Combine like terms: 40 + -40 = 0
-40 + -13s + -1s2 = 0 + 13s + -13s + s2 + -1s2
-40 + -13s + -1s2 = 13s + -13s + s2 + -1s2

Combine like terms: 13s + -13s = 0
-40 + -13s + -1s2 = 0 + s2 + -1s2
-40 + -13s + -1s2 = s2 + -1s2

Combine like terms: s2 + -1s2 = 0
-40 + -13s + -1s2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(40 + 13s + s2) = 0

Factor a trinomial.
-1((8 + s)(5 + s)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(8 + s)' equal to zero and attempt to solve: Simplifying 8 + s = 0 Solving 8 + s = 0 Move all terms containing s to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + s = 0 + -8 Combine like terms: 8 + -8 = 0 0 + s = 0 + -8 s = 0 + -8 Combine like terms: 0 + -8 = -8 s = -8 Simplifying s = -8

Subproblem 2

Set the factor '(5 + s)' equal to zero and attempt to solve: Simplifying 5 + s = 0 Solving 5 + s = 0 Move all terms containing s to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + s = 0 + -5 Combine like terms: 5 + -5 = 0 0 + s = 0 + -5 s = 0 + -5 Combine like terms: 0 + -5 = -5 s = -5 Simplifying s = -5

Solution

s = {-8, -5}

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