x^2-x-68=0

Simple and best practice solution for x^2-x-68=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 x^2-x-68=0 equation:


Simplifying
x2 + -1x + -68 = 0

Reorder the terms:
-68 + -1x + x2 = 0

Solving
-68 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '68' to each side of the equation.
-68 + -1x + 68 + x2 = 0 + 68

Reorder the terms:
-68 + 68 + -1x + x2 = 0 + 68

Combine like terms: -68 + 68 = 0
0 + -1x + x2 = 0 + 68
-1x + x2 = 0 + 68

Combine like terms: 0 + 68 = 68
-1x + x2 = 68

The x term is -1x.  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.
-1x + 0.25 + x2 = 68 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 68 + 0.25

Combine like terms: 68 + 0.25 = 68.25
0.25 + -1x + x2 = 68.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 68.25

Calculate the square root of the right side: 8.261355821

Break this problem into two subproblems by setting 
(x + -0.5) equal to 8.261355821 and -8.261355821.

Subproblem 1

x + -0.5 = 8.261355821 Simplifying x + -0.5 = 8.261355821 Reorder the terms: -0.5 + x = 8.261355821 Solving -0.5 + x = 8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 8.261355821 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 8.261355821 + 0.5 x = 8.261355821 + 0.5 Combine like terms: 8.261355821 + 0.5 = 8.761355821 x = 8.761355821 Simplifying x = 8.761355821

Subproblem 2

x + -0.5 = -8.261355821 Simplifying x + -0.5 = -8.261355821 Reorder the terms: -0.5 + x = -8.261355821 Solving -0.5 + x = -8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -8.261355821 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -8.261355821 + 0.5 x = -8.261355821 + 0.5 Combine like terms: -8.261355821 + 0.5 = -7.761355821 x = -7.761355821 Simplifying x = -7.761355821

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.761355821, -7.761355821}

See similar equations:

| 67qd+40q^2+28d^2=0 | | 40q^2+68qd+28d^2=0 | | 5g*-2*3g= | | 3fg*f= | | 4*2e= | | (8x-4)(x+3)= | | 4p+18p-7p= | | -10x-1=3x-9 | | 8x-x= | | 19d-2d= | | x^3+3x^2+5x+3=0 | | 7x+9=-1 | | -7+(-16)/(-8)*3= | | -7+(-16)/(-8)*3= | | 7x-9=-1 | | 10x^2-44x-96=0 | | 10x^2-44b-96=0 | | 0=-16t^2+80t+1 | | 7(c+4)=7(c-2) | | (x+6)(y-1)= | | 5n^2+5n-5=0 | | 16t^2+20t-204=0 | | 3x^4+11x-4= | | x^2-18*x+17=0 | | x^2+16x-55= | | y=4-8x | | (8+u)(4u+7)=0 | | 0.77+0.33t=2.01t-0.49 | | 3p-3=12 | | 3x+6+2x-5=2x-5 | | 2x-(3x+6)=9x-26 | | 5x=16-x |

Equations solver categories