x^2-8x-122=0

Simple and best practice solution for x^2-8x-122=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^2-8x-122=0 equation:


Simplifying
x2 + -8x + -122 = 0

Reorder the terms:
-122 + -8x + x2 = 0

Solving
-122 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '122' to each side of the equation.
-122 + -8x + 122 + x2 = 0 + 122

Reorder the terms:
-122 + 122 + -8x + x2 = 0 + 122

Combine like terms: -122 + 122 = 0
0 + -8x + x2 = 0 + 122
-8x + x2 = 0 + 122

Combine like terms: 0 + 122 = 122
-8x + x2 = 122

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 = 122 + 16

Reorder the terms:
16 + -8x + x2 = 122 + 16

Combine like terms: 122 + 16 = 138
16 + -8x + x2 = 138

Factor a perfect square on the left side:
(x + -4)(x + -4) = 138

Calculate the square root of the right side: 11.747340124

Break this problem into two subproblems by setting 
(x + -4) equal to 11.747340124 and -11.747340124.

Subproblem 1

x + -4 = 11.747340124 Simplifying x + -4 = 11.747340124 Reorder the terms: -4 + x = 11.747340124 Solving -4 + x = 11.747340124 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 = 11.747340124 + 4 Combine like terms: -4 + 4 = 0 0 + x = 11.747340124 + 4 x = 11.747340124 + 4 Combine like terms: 11.747340124 + 4 = 15.747340124 x = 15.747340124 Simplifying x = 15.747340124

Subproblem 2

x + -4 = -11.747340124 Simplifying x + -4 = -11.747340124 Reorder the terms: -4 + x = -11.747340124 Solving -4 + x = -11.747340124 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 = -11.747340124 + 4 Combine like terms: -4 + 4 = 0 0 + x = -11.747340124 + 4 x = -11.747340124 + 4 Combine like terms: -11.747340124 + 4 = -7.747340124 x = -7.747340124 Simplifying x = -7.747340124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.747340124, -7.747340124}

See similar equations:

| 4x^2-33x+39=-6x+4 | | 12x^2-8x+122=0 | | 9x-5x=7x+5 | | 12x^2-8x-122=0 | | x^2+2x-3=6 | | 2y+5=10-5y | | 3v-35=5+2v | | x^2+8x+24=4x-1 | | 3z+6=5z-2 | | x^7=1143 | | 5x+2=-28-x | | 2w+5=4w+1 | | 2x^3-4x^2+3x-4=0 | | 2x-3(4-x)=12+x | | 9y+3=36whatisy | | 12x^2=175 | | X+6Y=60 | | (1+xy)ydx+x(1-xy)dy=0 | | -3x(1-x)=4x-8 | | 7y+4x=82 | | (193)x=(623)8 | | 4x+7y=82 | | (5x+4)(5x+4)-8=(x-10) | | 34-2x=9-7x | | 8x-120=4x-12 | | x=-0,25x+1 | | 5x=-0,5+3x | | 5x=-0,5x+3x | | 3x-x=x+4 | | 6x+2y+9=0 | | -(6x+2)+2=14 | | 5+42x=21x+8 |

Equations solver categories