3u^2+12u+11=0

Simple and best practice solution for 3u^2+12u+11=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 3u^2+12u+11=0 equation:


Simplifying
3u2 + 12u + 11 = 0

Reorder the terms:
11 + 12u + 3u2 = 0

Solving
11 + 12u + 3u2 = 0

Solving for variable 'u'.

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

Divide each side by '3'.
3.666666667 + 4u + u2 = 0

Move the constant term to the right:

Add '-3.666666667' to each side of the equation.
3.666666667 + 4u + -3.666666667 + u2 = 0 + -3.666666667

Reorder the terms:
3.666666667 + -3.666666667 + 4u + u2 = 0 + -3.666666667

Combine like terms: 3.666666667 + -3.666666667 = 0.000000000
0.000000000 + 4u + u2 = 0 + -3.666666667
4u + u2 = 0 + -3.666666667

Combine like terms: 0 + -3.666666667 = -3.666666667
4u + u2 = -3.666666667

The u term is 4u.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4u + 4 + u2 = -3.666666667 + 4

Reorder the terms:
4 + 4u + u2 = -3.666666667 + 4

Combine like terms: -3.666666667 + 4 = 0.333333333
4 + 4u + u2 = 0.333333333

Factor a perfect square on the left side:
(u + 2)(u + 2) = 0.333333333

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(u + 2) equal to 0.577350269 and -0.577350269.

Subproblem 1

u + 2 = 0.577350269 Simplifying u + 2 = 0.577350269 Reorder the terms: 2 + u = 0.577350269 Solving 2 + u = 0.577350269 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + u = 0.577350269 + -2 Combine like terms: 2 + -2 = 0 0 + u = 0.577350269 + -2 u = 0.577350269 + -2 Combine like terms: 0.577350269 + -2 = -1.422649731 u = -1.422649731 Simplifying u = -1.422649731

Subproblem 2

u + 2 = -0.577350269 Simplifying u + 2 = -0.577350269 Reorder the terms: 2 + u = -0.577350269 Solving 2 + u = -0.577350269 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + u = -0.577350269 + -2 Combine like terms: 2 + -2 = 0 0 + u = -0.577350269 + -2 u = -0.577350269 + -2 Combine like terms: -0.577350269 + -2 = -2.577350269 u = -2.577350269 Simplifying u = -2.577350269

Solution

The solution to the problem is based on the solutions from the subproblems. u = {-1.422649731, -2.577350269}

See similar equations:

| 2(a-8)=2 | | 3sqrtx+5+6=4 | | (q+7)*2=14 | | 6y*3y= | | 54=3(10-2x) | | (e+4)*5=40 | | 10m-27=63 | | 7/5x-3/5=-10 | | 4x+45=105 | | 2(f-4)=8 | | 5-2(x+3)=3(2x-1) | | 40+s=386 | | 8m-11=35 | | 10(s-8)=-189 | | 46=6x+12 | | 8y^2(y^6)^3/4y^24 | | -3m=9/11 | | 2n+60=110 | | tanx=12.7 | | 3/11x=2/3 | | 7//2 | | -10=42 | | 17.95x+995=6.00x+3975 | | w-5/4=6/7 | | 3(x+5)2=108 | | 4x^2-9x+42=0 | | 3x+45-2x-40=6x-45 | | 2(4s+2)=28 | | 2x+72=3x | | 30=5(2x-4) | | s*5-20=70 | | 8(2l+7)=136 |

Equations solver categories