3s^2-23s-40=0

Simple and best practice solution for 3s^2-23s-40=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 3s^2-23s-40=0 equation:


Simplifying
3s2 + -23s + -40 = 0

Reorder the terms:
-40 + -23s + 3s2 = 0

Solving
-40 + -23s + 3s2 = 0

Solving for variable 's'.

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

Divide each side by '3'.
-13.33333333 + -7.666666667s + s2 = 0

Move the constant term to the right:

Add '13.33333333' to each side of the equation.
-13.33333333 + -7.666666667s + 13.33333333 + s2 = 0 + 13.33333333

Reorder the terms:
-13.33333333 + 13.33333333 + -7.666666667s + s2 = 0 + 13.33333333

Combine like terms: -13.33333333 + 13.33333333 = 0.00000000
0.00000000 + -7.666666667s + s2 = 0 + 13.33333333
-7.666666667s + s2 = 0 + 13.33333333

Combine like terms: 0 + 13.33333333 = 13.33333333
-7.666666667s + s2 = 13.33333333

The s term is -7.666666667s.  Take half its coefficient (-3.833333334).
Square it (14.69444445) and add it to both sides.

Add '14.69444445' to each side of the equation.
-7.666666667s + 14.69444445 + s2 = 13.33333333 + 14.69444445

Reorder the terms:
14.69444445 + -7.666666667s + s2 = 13.33333333 + 14.69444445

Combine like terms: 13.33333333 + 14.69444445 = 28.02777778
14.69444445 + -7.666666667s + s2 = 28.02777778

Factor a perfect square on the left side:
(s + -3.833333334)(s + -3.833333334) = 28.02777778

Calculate the square root of the right side: 5.294126725

Break this problem into two subproblems by setting 
(s + -3.833333334) equal to 5.294126725 and -5.294126725.

Subproblem 1

s + -3.833333334 = 5.294126725 Simplifying s + -3.833333334 = 5.294126725 Reorder the terms: -3.833333334 + s = 5.294126725 Solving -3.833333334 + s = 5.294126725 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '3.833333334' to each side of the equation. -3.833333334 + 3.833333334 + s = 5.294126725 + 3.833333334 Combine like terms: -3.833333334 + 3.833333334 = 0.000000000 0.000000000 + s = 5.294126725 + 3.833333334 s = 5.294126725 + 3.833333334 Combine like terms: 5.294126725 + 3.833333334 = 9.127460059 s = 9.127460059 Simplifying s = 9.127460059

Subproblem 2

s + -3.833333334 = -5.294126725 Simplifying s + -3.833333334 = -5.294126725 Reorder the terms: -3.833333334 + s = -5.294126725 Solving -3.833333334 + s = -5.294126725 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '3.833333334' to each side of the equation. -3.833333334 + 3.833333334 + s = -5.294126725 + 3.833333334 Combine like terms: -3.833333334 + 3.833333334 = 0.000000000 0.000000000 + s = -5.294126725 + 3.833333334 s = -5.294126725 + 3.833333334 Combine like terms: -5.294126725 + 3.833333334 = -1.460793391 s = -1.460793391 Simplifying s = -1.460793391

Solution

The solution to the problem is based on the solutions from the subproblems. s = {9.127460059, -1.460793391}

See similar equations:

| 0=x-2-1+x | | 2x-5=-4x+1 | | Y-7=1/15(x-80) | | 6b+7=31 | | 5/2(26) | | 4+12x=52 | | 1+10=11 | | 5/2x-5=60 | | 1/4x3/6 | | 8r+24=32r-96 | | Bn=2*5N | | 10m+5n-4m+11n= | | 92x+1=27x-5 | | a^2(a^5)(a^3)=a^11 | | 5y+2=42 | | 5(4x+6)-2(3x+10)=2(x+17) | | 5(4x+6)-(3x+10)=2(x+17) | | 6ab^2(-a)(-5a)= | | 15y=15y | | 173/8-144/8 | | x^3-4x^2-x+40=0 | | 6bc+c=2c-3bx | | 4(y+2)=y+20 | | x^2-4x+8y=0 | | 8m+16=9m+10 | | 10x(5+7)=22-2 | | 5(3x-3)+13=4(x+5) | | 4(n+7)=2n+14 | | 100(9-6)=50 | | 9m=3(7m+12) | | 3x+4(3x)=60 | | 13(a-6)=-4-9 |

Equations solver categories