x^2-5x+1=8

Simple and best practice solution for x^2-5x+1=8 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+1=8 equation:


Simplifying
x2 + -5x + 1 = 8

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

Solving
1 + -5x + x2 = 8

Solving for variable 'x'.

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

Combine like terms: 1 + -8 = -7
-7 + -5x + x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-7 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -5x + 7 + x2 = 0 + 7

Reorder the terms:
-7 + 7 + -5x + x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -5x + x2 = 0 + 7
-5x + x2 = 0 + 7

Combine like terms: 0 + 7 = 7
-5x + x2 = 7

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 7 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 7 + 6.25

Combine like terms: 7 + 6.25 = 13.25
6.25 + -5x + x2 = 13.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 13.25

Calculate the square root of the right side: 3.640054945

Break this problem into two subproblems by setting 
(x + -2.5) equal to 3.640054945 and -3.640054945.

Subproblem 1

x + -2.5 = 3.640054945 Simplifying x + -2.5 = 3.640054945 Reorder the terms: -2.5 + x = 3.640054945 Solving -2.5 + x = 3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 3.640054945 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 3.640054945 + 2.5 x = 3.640054945 + 2.5 Combine like terms: 3.640054945 + 2.5 = 6.140054945 x = 6.140054945 Simplifying x = 6.140054945

Subproblem 2

x + -2.5 = -3.640054945 Simplifying x + -2.5 = -3.640054945 Reorder the terms: -2.5 + x = -3.640054945 Solving -2.5 + x = -3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -3.640054945 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -3.640054945 + 2.5 x = -3.640054945 + 2.5 Combine like terms: -3.640054945 + 2.5 = -1.140054945 x = -1.140054945 Simplifying x = -1.140054945

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.140054945, -1.140054945}

See similar equations:

| 29=3y+8y+7 | | 12-4y^2=8 | | 3/4+1/2= | | 2(4x+7)=2-4X | | 2x-3+3x=22 | | 8=2q^2 | | (2x-4)(2x-4)=1 | | [2y+5][y-4]=0 | | t^2=11 | | 2(4x+7)=12k-4 | | 0.2w+3=6 | | 7-3x=2x-3 | | [y-3][y+2]=0 | | x^2+9=16 | | p^2=81 | | 6=14-2y | | 500=23x | | .83x+.5=.25(x-4) | | x+(-23)=-90 | | Y-4=-2(x+7) | | 8x-10=11+11x | | x+21=3x+5 | | 2k^2+3k-9=0 | | 25=3s-4(20-s) | | 4x+11=-2x-7 | | ab^9= | | -2x=-116 | | 6r^2+11r+3=0 | | -12t+6+7t=8t-3 | | 3x-6-2x+1=-12 | | 12a^2+11a-5=0 | | 5x-2x=27 |

Equations solver categories