u^2-5u-11=0

Simple and best practice solution for u^2-5u-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 u^2-5u-11=0 equation:


Simplifying
u2 + -5u + -11 = 0

Reorder the terms:
-11 + -5u + u2 = 0

Solving
-11 + -5u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + -5u + 11 + u2 = 0 + 11

Reorder the terms:
-11 + 11 + -5u + u2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -5u + u2 = 0 + 11
-5u + u2 = 0 + 11

Combine like terms: 0 + 11 = 11
-5u + u2 = 11

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 = 11 + 6.25

Reorder the terms:
6.25 + -5u + u2 = 11 + 6.25

Combine like terms: 11 + 6.25 = 17.25
6.25 + -5u + u2 = 17.25

Factor a perfect square on the left side:
(u + -2.5)(u + -2.5) = 17.25

Calculate the square root of the right side: 4.153311931

Break this problem into two subproblems by setting 
(u + -2.5) equal to 4.153311931 and -4.153311931.

Subproblem 1

u + -2.5 = 4.153311931 Simplifying u + -2.5 = 4.153311931 Reorder the terms: -2.5 + u = 4.153311931 Solving -2.5 + u = 4.153311931 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 = 4.153311931 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = 4.153311931 + 2.5 u = 4.153311931 + 2.5 Combine like terms: 4.153311931 + 2.5 = 6.653311931 u = 6.653311931 Simplifying u = 6.653311931

Subproblem 2

u + -2.5 = -4.153311931 Simplifying u + -2.5 = -4.153311931 Reorder the terms: -2.5 + u = -4.153311931 Solving -2.5 + u = -4.153311931 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 = -4.153311931 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + u = -4.153311931 + 2.5 u = -4.153311931 + 2.5 Combine like terms: -4.153311931 + 2.5 = -1.653311931 u = -1.653311931 Simplifying u = -1.653311931

Solution

The solution to the problem is based on the solutions from the subproblems. u = {6.653311931, -1.653311931}

See similar equations:

| 6x+9=x+54 | | 4x^2+19x-20=0 | | 11x^2+12x-4=0 | | 3700/10 | | y^2=-6x-8y-22 | | x^2=-6y-8x-22 | | 24x^2+6x=9 | | x^2+8x+6y+22=0 | | -7=b/3 | | 3a^2-14=0 | | .5=r/3+1/6 | | ln(2+x)=6 | | 4b^2-7=-49 | | (u^2-5u-11)/(u^2-3u-10)=-1 | | 2p^2-7p-49=0 | | 5e^4x=34 | | x^6-4x^3-x+3=0 | | 1.7+x+(0.71x-2.4)=0 | | (u^2-5u-11)/(u^2-3u-10) | | 2x+3wx=x+2 | | 12m^2-126m+294=0 | | 15x^2-26x=y+7y^2 | | 63n^2-132n+45= | | 0=3t^2+2t-1 | | x^1/5=5 | | -5t^3+40t=0 | | (5c^3/2bc)/(15c/4b) | | 11111*11111= | | (3t-2)=(-1.0t+2) | | cos(2x+50)=0.5 | | 6-7(a+1)=3(2-9) | | 4x^2+28x+40=x |

Equations solver categories