2x^2-x-69=0

Simple and best practice solution for 2x^2-x-69=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 2x^2-x-69=0 equation:


Simplifying
2x2 + -1x + -69 = 0

Reorder the terms:
-69 + -1x + 2x2 = 0

Solving
-69 + -1x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-34.5 + -0.5x + x2 = 0

Move the constant term to the right:

Add '34.5' to each side of the equation.
-34.5 + -0.5x + 34.5 + x2 = 0 + 34.5

Reorder the terms:
-34.5 + 34.5 + -0.5x + x2 = 0 + 34.5

Combine like terms: -34.5 + 34.5 = 0.0
0.0 + -0.5x + x2 = 0 + 34.5
-0.5x + x2 = 0 + 34.5

Combine like terms: 0 + 34.5 = 34.5
-0.5x + x2 = 34.5

The x term is -0.5x.  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.
-0.5x + 0.0625 + x2 = 34.5 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 34.5 + 0.0625

Combine like terms: 34.5 + 0.0625 = 34.5625
0.0625 + -0.5x + x2 = 34.5625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 34.5625

Calculate the square root of the right side: 5.878988008

Break this problem into two subproblems by setting 
(x + -0.25) equal to 5.878988008 and -5.878988008.

Subproblem 1

x + -0.25 = 5.878988008 Simplifying x + -0.25 = 5.878988008 Reorder the terms: -0.25 + x = 5.878988008 Solving -0.25 + x = 5.878988008 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 5.878988008 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 5.878988008 + 0.25 x = 5.878988008 + 0.25 Combine like terms: 5.878988008 + 0.25 = 6.128988008 x = 6.128988008 Simplifying x = 6.128988008

Subproblem 2

x + -0.25 = -5.878988008 Simplifying x + -0.25 = -5.878988008 Reorder the terms: -0.25 + x = -5.878988008 Solving -0.25 + x = -5.878988008 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -5.878988008 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -5.878988008 + 0.25 x = -5.878988008 + 0.25 Combine like terms: -5.878988008 + 0.25 = -5.628988008 x = -5.628988008 Simplifying x = -5.628988008

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.128988008, -5.628988008}

See similar equations:

| 6v+-6(8v+-1)= | | n+-14=20 | | 6z+5z^2=8 | | 40+k=-8(k-5) | | 2x+8+6x=24 | | 3v+8v*2+9v*2= | | y+-1.4=-2.7 | | f+9=16+2 | | C(x)=13x+44 | | 125+3.5d= | | 17.50d+3.50d= | | 16y+24=156 | | 4x+5-3x=7+3x-6 | | 3(x+2)+2=-1 | | (-2.7x^2)+(30x)-5.5=0 | | 10(10r+8)= | | -6(6x+7)=2x-4 | | 3362.1x^2-17270x+24043=0 | | -6(6x)=2x-4 | | 5.5+1.6n=1.98 | | 5.6b-3= | | 5(x+3)+3=-17 | | 6.8-4.2b= | | 3362.1x^2-17270x+24043=450000 | | 4(7s+8)+10= | | -2x(4x+2)4x-2= | | 18x^2-42x+24=0 | | 8m-(5n+8)=1 | | 4(3a-10)= | | (k-2)x^2-x-4k=0 | | -.50(-2x-4)-.75(4x-8)-[2(-3x-1)-5x]= | | 58=-2(22-b)+4(b-3) |

Equations solver categories