u^2-5u-5=0

Simple and best practice solution for u^2-5u-5=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 u^2-5u-5=0 equation:


Simplifying
u2 + -5u + -5 = 0

Reorder the terms:
-5 + -5u + u2 = 0

Solving
-5 + -5u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -5u + 5 + u2 = 0 + 5

Reorder the terms:
-5 + 5 + -5u + u2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -5u + u2 = 0 + 5
-5u + u2 = 0 + 5

Combine like terms: 0 + 5 = 5
-5u + u2 = 5

The u term is -5u.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5u + 6.25 + u2 = 5 + 6.25

Reorder the terms:
6.25 + -5u + u2 = 5 + 6.25

Combine like terms: 5 + 6.25 = 11.25
6.25 + -5u + u2 = 11.25

Factor a perfect square on the left side:
(u + -2.5)(u + -2.5) = 11.25

Calculate the square root of the right side: 3.354101966

Break this problem into two subproblems by setting 
(u + -2.5) equal to 3.354101966 and -3.354101966.

Subproblem 1

u + -2.5 = 3.354101966 Simplifying u + -2.5 = 3.354101966 Reorder the terms: -2.5 + u = 3.354101966 Solving -2.5 + u = 3.354101966 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + u = 3.354101966 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = 3.354101966 + 2.5 u = 3.354101966 + 2.5 Combine like terms: 3.354101966 + 2.5 = 5.854101966 u = 5.854101966 Simplifying u = 5.854101966

Subproblem 2

u + -2.5 = -3.354101966 Simplifying u + -2.5 = -3.354101966 Reorder the terms: -2.5 + u = -3.354101966 Solving -2.5 + u = -3.354101966 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + u = -3.354101966 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = -3.354101966 + 2.5 u = -3.354101966 + 2.5 Combine like terms: -3.354101966 + 2.5 = -0.854101966 u = -0.854101966 Simplifying u = -0.854101966

Solution

The solution to the problem is based on the solutions from the subproblems. u = {5.854101966, -0.854101966}

See similar equations:

| 4a^2+20a-24= | | (w^3/-3v^2)^3= | | (w^3/-3v^2)^3 | | x^2-1=2x+14 | | y=14-4 | | 7u*3u^4*x^3*2x^7= | | 2a+3+3a-5= | | Nx(-6+2)=32 | | Log(x+5)-Log(x+1)=2 | | 2.3x(4+12)= | | 2*(6n^2-17)=19 | | 7-(x+10)=4 | | 9+10=48x^6 | | -3(a-2)-a^2=8a | | 20p-8=2+19p | | x-(x-4)=2 | | 35=(9-3)-N | | 7ln(x)=49 | | 29x= | | n+4-5(3n-6)= | | Log(x+5)-Log(x+1)=1 | | x^2-1=5x+5 | | 4+7lnx=53 | | 12x+32=10x | | tan(3x)=1 | | x=-5-x-6 | | -13+7c=8c | | y^2+1=16 | | 1.4=4y+18.2 | | (x-2)(x-(5+i))(x-(5-i))=0 | | 13+7c=8c | | 6y^2-2y-4=0 |

Equations solver categories