x^2-4x-8=3x-2

Simple and best practice solution for x^2-4x-8=3x-2 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^2-4x-8=3x-2 equation:


Simplifying
x2 + -4x + -8 = 3x + -2

Reorder the terms:
-8 + -4x + x2 = 3x + -2

Reorder the terms:
-8 + -4x + x2 = -2 + 3x

Solving
-8 + -4x + x2 = -2 + 3x

Solving for variable 'x'.

Reorder the terms:
-8 + 2 + -4x + -3x + x2 = -2 + 3x + 2 + -3x

Combine like terms: -8 + 2 = -6
-6 + -4x + -3x + x2 = -2 + 3x + 2 + -3x

Combine like terms: -4x + -3x = -7x
-6 + -7x + x2 = -2 + 3x + 2 + -3x

Reorder the terms:
-6 + -7x + x2 = -2 + 2 + 3x + -3x

Combine like terms: -2 + 2 = 0
-6 + -7x + x2 = 0 + 3x + -3x
-6 + -7x + x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-6 + -7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -7x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + -7x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -7x + x2 = 0 + 6
-7x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
-7x + x2 = 6

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 6 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 6 + 12.25

Combine like terms: 6 + 12.25 = 18.25
12.25 + -7x + x2 = 18.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 18.25

Calculate the square root of the right side: 4.272001873

Break this problem into two subproblems by setting 
(x + -3.5) equal to 4.272001873 and -4.272001873.

Subproblem 1

x + -3.5 = 4.272001873 Simplifying x + -3.5 = 4.272001873 Reorder the terms: -3.5 + x = 4.272001873 Solving -3.5 + x = 4.272001873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 4.272001873 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 4.272001873 + 3.5 x = 4.272001873 + 3.5 Combine like terms: 4.272001873 + 3.5 = 7.772001873 x = 7.772001873 Simplifying x = 7.772001873

Subproblem 2

x + -3.5 = -4.272001873 Simplifying x + -3.5 = -4.272001873 Reorder the terms: -3.5 + x = -4.272001873 Solving -3.5 + x = -4.272001873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -4.272001873 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -4.272001873 + 3.5 x = -4.272001873 + 3.5 Combine like terms: -4.272001873 + 3.5 = -0.772001873 x = -0.772001873 Simplifying x = -0.772001873

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.772001873, -0.772001873}

See similar equations:

| B^2-6b+18=0 | | 64x=140 | | 11(x+5)=55 | | 57x=130 | | 4x^2-8=3x+2 | | 19b-14b=10 | | -3x+15y=-8 | | x+6.7=1-0.2x | | 13(x-6)+8x=7(3x+4)-8 | | -6x+20y=30 | | 3-9=9 | | 100+5+1x=200 | | x-9/2=7 | | 3.5b+7=14 | | p=2x+3b | | p=2x+36 | | logx*log2(x/2)=8 | | x^16/x^4 | | 4-9x=3x-2 | | 3/2x-8/1=1 | | 6(x+7)-6(9-6)=18 | | 4=x-7/3 | | 4x^2=-4x+1 | | 19.5=a+24 | | 13x-4=5x+9 | | x-74=-146 | | 8b+9=10 | | 4m-3m+m=8 | | 4+9x-2=9x+23-7x | | 5+nab+4=10 | | 1.5x-8=1 | | K/8=18 |

Equations solver categories