s^2=45-4s-s^2

Simple and best practice solution for s^2=45-4s-s^2 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=45-4s-s^2 equation:


Simplifying
s2 = 45 + -4s + -1s2

Solving
s2 = 45 + -4s + -1s2

Solving for variable 's'.

Reorder the terms:
-45 + 4s + s2 + s2 = 45 + -4s + -1s2 + -45 + 4s + s2

Combine like terms: s2 + s2 = 2s2
-45 + 4s + 2s2 = 45 + -4s + -1s2 + -45 + 4s + s2

Reorder the terms:
-45 + 4s + 2s2 = 45 + -45 + -4s + 4s + -1s2 + s2

Combine like terms: 45 + -45 = 0
-45 + 4s + 2s2 = 0 + -4s + 4s + -1s2 + s2
-45 + 4s + 2s2 = -4s + 4s + -1s2 + s2

Combine like terms: -4s + 4s = 0
-45 + 4s + 2s2 = 0 + -1s2 + s2
-45 + 4s + 2s2 = -1s2 + s2

Combine like terms: -1s2 + s2 = 0
-45 + 4s + 2s2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-22.5 + 2s + s2 = 0

Move the constant term to the right:

Add '22.5' to each side of the equation.
-22.5 + 2s + 22.5 + s2 = 0 + 22.5

Reorder the terms:
-22.5 + 22.5 + 2s + s2 = 0 + 22.5

Combine like terms: -22.5 + 22.5 = 0.0
0.0 + 2s + s2 = 0 + 22.5
2s + s2 = 0 + 22.5

Combine like terms: 0 + 22.5 = 22.5
2s + s2 = 22.5

The s term is 2s.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2s + 1 + s2 = 22.5 + 1

Reorder the terms:
1 + 2s + s2 = 22.5 + 1

Combine like terms: 22.5 + 1 = 23.5
1 + 2s + s2 = 23.5

Factor a perfect square on the left side:
(s + 1)(s + 1) = 23.5

Calculate the square root of the right side: 4.847679857

Break this problem into two subproblems by setting 
(s + 1) equal to 4.847679857 and -4.847679857.

Subproblem 1

s + 1 = 4.847679857 Simplifying s + 1 = 4.847679857 Reorder the terms: 1 + s = 4.847679857 Solving 1 + s = 4.847679857 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + s = 4.847679857 + -1 Combine like terms: 1 + -1 = 0 0 + s = 4.847679857 + -1 s = 4.847679857 + -1 Combine like terms: 4.847679857 + -1 = 3.847679857 s = 3.847679857 Simplifying s = 3.847679857

Subproblem 2

s + 1 = -4.847679857 Simplifying s + 1 = -4.847679857 Reorder the terms: 1 + s = -4.847679857 Solving 1 + s = -4.847679857 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + s = -4.847679857 + -1 Combine like terms: 1 + -1 = 0 0 + s = -4.847679857 + -1 s = -4.847679857 + -1 Combine like terms: -4.847679857 + -1 = -5.847679857 s = -5.847679857 Simplifying s = -5.847679857

Solution

The solution to the problem is based on the solutions from the subproblems. s = {3.847679857, -5.847679857}

See similar equations:

| .3/.2=18/? | | X/3- | | 6w+3w=27 | | 3x-450=2816 | | V/-3.3=-14.8 | | -5(5n-5)+3n=0 | | -3y-8x=12 | | 8sin(2pi/3) | | y=(x+2)(x-(3+i))(x+(3-i)) | | 6x+26=8x+36 | | =(x+2)(x-(3+i))(x+(3-i)) | | 9z+z=9z+5 | | -9+3y-x=0 | | 0=100-0.01(x^2) | | 18x-15/3 | | 6(x+7)-11=0 | | 0=100-0.001(x^2) | | -14=3(w-3)/5 | | 5(x+9)-15= | | X+17y=15 | | y+2=2(x+4) | | f(y)=4y-7 | | -6/7w-5/2=-5/3 | | f(y-1)=4y-7 | | X=117+4y | | 21y-56-6y=4 | | 14x+30=6y | | 0.25=4/x | | 23.50x-0.25=14.50 | | -9/4=2/3y-8/5 | | f(x)=9x^3+5x^2+x-10 | | 8+v=25 |

Equations solver categories