s^2+15s+70=0

Solution for s^2+15s+70=0 equation:

Simplifying
s2 + 15s + 70 = 0

Reorder the terms:
70 + 15s + s2 = 0

Solving
70 + 15s + s2 = 0

Solving for variable 's'.

Begin completing the square.

Move the constant term to the right:

Add '-70' to each side of the equation.
70 + 15s + -70 + s2 = 0 + -70

Reorder the terms:
70 + -70 + 15s + s2 = 0 + -70

Combine like terms: 70 + -70 = 0
0 + 15s + s2 = 0 + -70
15s + s2 = 0 + -70

Combine like terms: 0 + -70 = -70
15s + s2 = -70

The s term is 15s.  Take half its coefficient (7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
15s + 56.25 + s2 = -70 + 56.25

Reorder the terms:
56.25 + 15s + s2 = -70 + 56.25

Combine like terms: -70 + 56.25 = -13.75
56.25 + 15s + s2 = -13.75

Factor a perfect square on the left side:
(s + 7.5)(s + 7.5) = -13.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.