s^2+7s+18=0

Simple and best practice solution for s^2+7s+18=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for s^2+7s+18=0 equation:


Simplifying
s2 + 7s + 18 = 0

Reorder the terms:
18 + 7s + s2 = 0

Solving
18 + 7s + s2 = 0

Solving for variable 's'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 7s + -18 + s2 = 0 + -18

Reorder the terms:
18 + -18 + 7s + s2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 7s + s2 = 0 + -18
7s + s2 = 0 + -18

Combine like terms: 0 + -18 = -18
7s + s2 = -18

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 = -18 + 12.25

Reorder the terms:
12.25 + 7s + s2 = -18 + 12.25

Combine like terms: -18 + 12.25 = -5.75
12.25 + 7s + s2 = -5.75

Factor a perfect square on the left side:
(s + 3.5)(s + 3.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| 4(2x-5)=8+6x | | (p+27)+p(4p-37)=644 | | 1/2x^2+x-4=0 | | 12-5x=72 | | x^3-6x^2+-5x-7=0 | | 7x^2+4=8 | | (3x^2+17x+19)/(x+4) | | 3.6m-3-3.6m-7= | | 3y/4-5=2y | | (2w-3)(7w+5x-3)=x | | (2w-3)(7w+5x-3)= | | .25(10x-8)=7 | | 4v^2*4y*2y^2*v^6= | | ax+7=3x+5 | | 2x/3+4=3x | | 9-3/y=6 | | 5x/6-5=3x | | 4+9=-8+13 | | (81+88+x)/3=74 | | 3x(3x)=0 | | 5/x=10 | | (87+90+x)/3=79 | | 7(4+2)=4(5)+4 | | ((480-x)x)/480=120 | | (480-x)x/480=120 | | y-3=-4(x-2) | | a=2b/b+2 | | 4x/5-3=10 | | -40x+(-120)=4 | | -40x+(-120)=4(2/5) | | 336.51(4/3) | | 3x/7-6=5 |

Equations solver categories