2k^2-k-2=

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


Simplifying
2k2 + -1k + -2 = 0

Reorder the terms:
-2 + -1k + 2k2 = 0

Solving
-2 + -1k + 2k2 = 0

Solving for variable 'k'.

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

Divide each side by '2'.
-1 + -0.5k + k2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.5k + 1 + k2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.5k + k2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.5k + k2 = 0 + 1
-0.5k + k2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.5k + k2 = 1

The k term is -0.5k.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5k + 0.0625 + k2 = 1 + 0.0625

Reorder the terms:
0.0625 + -0.5k + k2 = 1 + 0.0625

Combine like terms: 1 + 0.0625 = 1.0625
0.0625 + -0.5k + k2 = 1.0625

Factor a perfect square on the left side:
(k + -0.25)(k + -0.25) = 1.0625

Calculate the square root of the right side: 1.030776406

Break this problem into two subproblems by setting 
(k + -0.25) equal to 1.030776406 and -1.030776406.

Subproblem 1

k + -0.25 = 1.030776406 Simplifying k + -0.25 = 1.030776406 Reorder the terms: -0.25 + k = 1.030776406 Solving -0.25 + k = 1.030776406 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + k = 1.030776406 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + k = 1.030776406 + 0.25 k = 1.030776406 + 0.25 Combine like terms: 1.030776406 + 0.25 = 1.280776406 k = 1.280776406 Simplifying k = 1.280776406

Subproblem 2

k + -0.25 = -1.030776406 Simplifying k + -0.25 = -1.030776406 Reorder the terms: -0.25 + k = -1.030776406 Solving -0.25 + k = -1.030776406 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + k = -1.030776406 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + k = -1.030776406 + 0.25 k = -1.030776406 + 0.25 Combine like terms: -1.030776406 + 0.25 = -0.780776406 k = -0.780776406 Simplifying k = -0.780776406

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.280776406, -0.780776406}

See similar equations:

| 4+q=3+2q | | x(15-x)=50 | | 21x-100=x^2+21-x | | 49x^2-37=0 | | 2/3=4 | | 42x^2=-11x+3 | | y^2+-2y+4=0 | | x+.05x=15 | | Y=x^3-10x^2-68x-168 | | 200=100+200x-100x^2 | | 2(-4+x)=-40 | | m^2+8m+3=-4 | | 4uv^5= | | 90=21x-6 | | 2.75=5n | | 398234+39284293*383= | | 3m^2=15-4m | | -5v^2+11v-10=0 | | 2a^2=60+2a | | 4u^2+28u+49= | | (4x^2y)(-3x^5y^4)= | | x+130=20 | | -15-(-6)x(16)= | | 27w^3-125= | | (2x+4)(3x-1)(5x+9)=0 | | 1-w^4= | | X^2+30x+180=-36 | | 21x^3y^2+177x^2y^2+72xy^2= | | 11+2(10-8x)=21-11x | | 35x^3y^2+45x^2y^2-50xy^2= | | -2x+3(-x+1)=-7 | | [4+7v]+8=25 |

Equations solver categories