2m^2-2m-1=0

Simple and best practice solution for 2m^2-2m-1=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 2m^2-2m-1=0 equation:


Simplifying
2m2 + -2m + -1 = 0

Reorder the terms:
-1 + -2m + 2m2 = 0

Solving
-1 + -2m + 2m2 = 0

Solving for variable 'm'.

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

Divide each side by '2'.
-0.5 + -1m + m2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -1m + 0.5 + m2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -1m + m2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -1m + m2 = 0 + 0.5
-1m + m2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-1m + m2 = 0.5

The m term is -1m.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1m + 0.25 + m2 = 0.5 + 0.25

Reorder the terms:
0.25 + -1m + m2 = 0.5 + 0.25

Combine like terms: 0.5 + 0.25 = 0.75
0.25 + -1m + m2 = 0.75

Factor a perfect square on the left side:
(m + -0.5)(m + -0.5) = 0.75

Calculate the square root of the right side: 0.866025404

Break this problem into two subproblems by setting 
(m + -0.5) equal to 0.866025404 and -0.866025404.

Subproblem 1

m + -0.5 = 0.866025404 Simplifying m + -0.5 = 0.866025404 Reorder the terms: -0.5 + m = 0.866025404 Solving -0.5 + m = 0.866025404 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + m = 0.866025404 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + m = 0.866025404 + 0.5 m = 0.866025404 + 0.5 Combine like terms: 0.866025404 + 0.5 = 1.366025404 m = 1.366025404 Simplifying m = 1.366025404

Subproblem 2

m + -0.5 = -0.866025404 Simplifying m + -0.5 = -0.866025404 Reorder the terms: -0.5 + m = -0.866025404 Solving -0.5 + m = -0.866025404 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + m = -0.866025404 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + m = -0.866025404 + 0.5 m = -0.866025404 + 0.5 Combine like terms: -0.866025404 + 0.5 = -0.366025404 m = -0.366025404 Simplifying m = -0.366025404

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.366025404, -0.366025404}

See similar equations:

| 6z-5z=19-17 | | (-2x+11)(-2x+11)=0 | | -x+2x+48=0 | | d+1.4=2.2 | | 3a+11=26 | | -5(x-y)=34 | | 4x^2-44x+116=0 | | 9x=8x+16 | | x=lx+4l-2 | | 5x^2-12=4x^2-4x | | -11+x=-51 | | 32+62+x=176 | | 4,8,6= | | m-38=-64 | | 3,6,9,12= | | x^6+14x^3-392x+49=0 | | p+-1.5=-3.6 | | 5.4=8.5y-7.5y+7.5 | | 18+n=44 | | v-14=11 | | p+1.7=-9.6 | | x-5.5=5 | | 6(6-2x)=4(12-8x) | | 3.7=c+3.5 | | 3a-1=26 | | -3=d+-1.3 | | 6.9n-5.9n+0.3=-4.1-7.9 | | r-7=-23 | | 5.2=r+4.4 | | 5(x-3)+2=27 | | 24z-23z-15=14 | | 3x+5x-8=16 |

Equations solver categories