2v^2-v-2=0

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


Simplifying
2v2 + -1v + -2 = 0

Reorder the terms:
-2 + -1v + 2v2 = 0

Solving
-2 + -1v + 2v2 = 0

Solving for variable 'v'.

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

Divide each side by '2'.
-1 + -0.5v + v2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.5v + 1 + v2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.5v + v2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.5v + v2 = 0 + 1
-0.5v + v2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.5v + v2 = 1

The v term is -0.5v.  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.
-0.5v + 0.0625 + v2 = 1 + 0.0625

Reorder the terms:
0.0625 + -0.5v + v2 = 1 + 0.0625

Combine like terms: 1 + 0.0625 = 1.0625
0.0625 + -0.5v + v2 = 1.0625

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

Calculate the square root of the right side: 1.030776406

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

Subproblem 1

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

Subproblem 2

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

Solution

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

See similar equations:

| 8-8x=84-22x | | 6w^2-11w+3=0 | | 4p+6q=70 | | 4p+6q=70 | | -2x^2-9x+18=0 | | -2x^2-9x+4=0 | | 2x+9x=58+x | | 10x+5=7x+11 | | 3p+3q=13 | | 2x^2+15x-10=0 | | 5y=7x+11 | | 170-6x=5x+5 | | 6x+35=9x+7 | | 3+2+1= | | 6w^2-11w+11=0 | | 51-6x=12x+17 | | -6w^2+11w-11=0 | | 240-5X=40X+20 | | 2=x^2+x^3 | | 3w^2+2w-5=0 | | -297=(x^5+2x^3) | | 2(t-5)+6(t+1)= | | 10+9=7x+27 | | 4x+30=6x+2 | | 3x+4(5x-3)=8 | | x+(x-81000)=865000 | | 9+3n=-6 | | Y+3-Y-3= | | -5n+3=12 | | x+(x-6.1)=415.3 | | 49x^2-42x+36=0 | | 8w-7=17 |

Equations solver categories