k^2+2k=11

Simple and best practice solution for k^2+2k=11 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 k^2+2k=11 equation:


Simplifying
k2 + 2k = 11

Reorder the terms:
2k + k2 = 11

Solving
2k + k2 = 11

Solving for variable 'k'.

Reorder the terms:
-11 + 2k + k2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + 2k + k2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 2k + 11 + k2 = 0 + 11

Reorder the terms:
-11 + 11 + 2k + k2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 2k + k2 = 0 + 11
2k + k2 = 0 + 11

Combine like terms: 0 + 11 = 11
2k + k2 = 11

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

Add '1' to each side of the equation.
2k + 1 + k2 = 11 + 1

Reorder the terms:
1 + 2k + k2 = 11 + 1

Combine like terms: 11 + 1 = 12
1 + 2k + k2 = 12

Factor a perfect square on the left side:
(k + 1)(k + 1) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(k + 1) equal to 3.464101615 and -3.464101615.

Subproblem 1

k + 1 = 3.464101615 Simplifying k + 1 = 3.464101615 Reorder the terms: 1 + k = 3.464101615 Solving 1 + k = 3.464101615 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = 3.464101615 + -1 Combine like terms: 1 + -1 = 0 0 + k = 3.464101615 + -1 k = 3.464101615 + -1 Combine like terms: 3.464101615 + -1 = 2.464101615 k = 2.464101615 Simplifying k = 2.464101615

Subproblem 2

k + 1 = -3.464101615 Simplifying k + 1 = -3.464101615 Reorder the terms: 1 + k = -3.464101615 Solving 1 + k = -3.464101615 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = -3.464101615 + -1 Combine like terms: 1 + -1 = 0 0 + k = -3.464101615 + -1 k = -3.464101615 + -1 Combine like terms: -3.464101615 + -1 = -4.464101615 k = -4.464101615 Simplifying k = -4.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. k = {2.464101615, -4.464101615}

See similar equations:

| H=273-421 | | 3x+2+-5=10x | | a^2+4ca+3c^2= | | 50=216-w | | 48z^3+44z^2-60z=0 | | 32=4c+12 | | 10b+11=-9 | | e=-6-(-13) | | 32y^3-36y^2+4y=0 | | 14x-2/5=1 | | y=-7/5+1 | | C=-847-98 | | 12-7x=114-28x | | x+2=9x-42 | | 1-5x+1=10-5x | | -2r=-312 | | B=-41-(-86) | | 2r^2-5r-3=0 | | n-3(1+2n)=17 | | 63-(-27)=f | | 12x+17=-19 | | 3q^2+11q-72=5q | | x^2+39=14x | | 4x-19=3x-19 | | -5x-2(-7x-7)=104 | | 5u-5=-15 | | 4x-9x-12=-5x+7-12 | | 7x+33x=-4 | | -54=6x+2(2x+18) | | 19(2r+16)=8(5r-1) | | a=5-(-3) | | 3+2lnx=8 |

Equations solver categories