0=x^2-8x+1

Simple and best practice solution for 0=x^2-8x+1 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 0=x^2-8x+1 equation:


Simplifying
0 = x2 + -8x + 1

Reorder the terms:
0 = 1 + -8x + x2

Solving
0 = 1 + -8x + x2

Solving for variable 'x'.

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

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

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

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
1 + -8x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -8x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -8x + x2 = 0 + -1

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

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

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -1 + 16

Reorder the terms:
16 + -8x + x2 = -1 + 16

Combine like terms: -1 + 16 = 15
16 + -8x + x2 = 15

Factor a perfect square on the left side:
(x + -4)(x + -4) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(x + -4) equal to 3.872983346 and -3.872983346.

Subproblem 1

x + -4 = 3.872983346 Simplifying x + -4 = 3.872983346 Reorder the terms: -4 + x = 3.872983346 Solving -4 + x = 3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.872983346 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.872983346 + 4 x = 3.872983346 + 4 Combine like terms: 3.872983346 + 4 = 7.872983346 x = 7.872983346 Simplifying x = 7.872983346

Subproblem 2

x + -4 = -3.872983346 Simplifying x + -4 = -3.872983346 Reorder the terms: -4 + x = -3.872983346 Solving -4 + x = -3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.872983346 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.872983346 + 4 x = -3.872983346 + 4 Combine like terms: -3.872983346 + 4 = 0.127016654 x = 0.127016654 Simplifying x = 0.127016654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.872983346, 0.127016654}

See similar equations:

| x+3y-(-2x)= | | p-(-3p)= | | -18v=3(12v+18) | | 4p+2q-(-3p)= | | 4x^2-10x+4= | | 7x^2-x-.5=0 | | 3a-(-4a)= | | 1y^2-28y-98=0 | | X+.20X=352 | | 7r+9=44 | | x^2+21x+110=0 | | 6(2n-1)=(8n+5)+4 | | x^22+21x+110=0 | | 6x^2-24x+16=-2 | | -56=8y | | 8(3n-4)=(2n+9)+5 | | 35x^2-8x-16=0 | | 35x^2+14x+7=0 | | (y-7)(y-7)+y^2=(y+7)(y+7) | | (3a+b)(-2b+a)= | | -2(t-2)+6t=8t-9 | | 3x+x=100 | | 2x(x+6)=(x+1)(x+6) | | 0.6(3x+6)=1.4-(x+2) | | 6+2b=1+1b | | 3x^2+19x+16=0 | | x^2+50x+400=0 | | 8(y-3)/5=-2y | | 3(3+5d)+4(10d+7)= | | 6-2(a-1)=5+a | | -7(x+4)-4=-32 | | 4x+7x=10.5x+14 |

Equations solver categories