s^2+7s=-13

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Solution for s^2+7s=-13 equation:


Simplifying
s2 + 7s = -13

Reorder the terms:
7s + s2 = -13

Solving
7s + s2 = -13

Solving for variable 's'.

Reorder the terms:
13 + 7s + s2 = -13 + 13

Combine like terms: -13 + 13 = 0
13 + 7s + s2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + 7s + -13 + s2 = 0 + -13

Reorder the terms:
13 + -13 + 7s + s2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 7s + s2 = 0 + -13
7s + s2 = 0 + -13

Combine like terms: 0 + -13 = -13
7s + s2 = -13

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 = -13 + 12.25

Reorder the terms:
12.25 + 7s + s2 = -13 + 12.25

Combine like terms: -13 + 12.25 = -0.75
12.25 + 7s + s2 = -0.75

Factor a perfect square on the left side:
(s + 3.5)(s + 3.5) = -0.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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