x^2-5x-8=x

Simple and best practice solution for x^2-5x-8=x 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^2-5x-8=x equation:


Simplifying
x2 + -5x + -8 = x

Reorder the terms:
-8 + -5x + x2 = x

Solving
-8 + -5x + x2 = x

Solving for variable 'x'.

Reorder the terms:
-8 + -5x + -1x + x2 = x + -1x

Combine like terms: -5x + -1x = -6x
-8 + -6x + x2 = x + -1x

Combine like terms: x + -1x = 0
-8 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + -6x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + -6x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -6x + x2 = 0 + 8
-6x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
-6x + x2 = 8

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 8 + 9

Reorder the terms:
9 + -6x + x2 = 8 + 9

Combine like terms: 8 + 9 = 17
9 + -6x + x2 = 17

Factor a perfect square on the left side:
(x + -3)(x + -3) = 17

Calculate the square root of the right side: 4.123105626

Break this problem into two subproblems by setting 
(x + -3) equal to 4.123105626 and -4.123105626.

Subproblem 1

x + -3 = 4.123105626 Simplifying x + -3 = 4.123105626 Reorder the terms: -3 + x = 4.123105626 Solving -3 + x = 4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 4.123105626 + 3 Combine like terms: -3 + 3 = 0 0 + x = 4.123105626 + 3 x = 4.123105626 + 3 Combine like terms: 4.123105626 + 3 = 7.123105626 x = 7.123105626 Simplifying x = 7.123105626

Subproblem 2

x + -3 = -4.123105626 Simplifying x + -3 = -4.123105626 Reorder the terms: -3 + x = -4.123105626 Solving -3 + x = -4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -4.123105626 + 3 Combine like terms: -3 + 3 = 0 0 + x = -4.123105626 + 3 x = -4.123105626 + 3 Combine like terms: -4.123105626 + 3 = -1.123105626 x = -1.123105626 Simplifying x = -1.123105626

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.123105626, -1.123105626}

See similar equations:

| -3(p-7)= | | x^-3/36x^-4 | | -5=9z+6 | | -x+1=27 | | 5y+2(y-6)=(y+1)-4 | | 7y+3(y-3)=5(y+1)-2 | | -6Y=(-110X/7)+80 | | 7.88=2*3.14r | | -16+(6x-4)=6 | | -16+(6x+4)=6 | | -3(r-4)= | | 20.3x=20(x+.0030) | | 63-6y=52+16y | | 5x-26=4(5+7x) | | -x-6/7y=-4/7 | | 3n-2+2(2n+1)=5n+7+n | | x^2=216 | | 7x+6y=4 | | x=-4/-15/6 | | 5x-7=6c | | 4z/4=8/4 | | c(2c-1)(4c+3)=0 | | 3+17y-1=6y+62-4y | | -4(3+n)= | | 5-2e^3x=2 | | 4x-1(x+6)=27 | | 6(t-2)+6=4(3t+4)-10 | | 2x-6(5+x)=x+10 | | 3x-(5x+1)=8x+2(x-3) | | 12-12y=12+2y | | 6(b+6)=6(b-6) | | 7x-11=4x+22 |

Equations solver categories