x^2-4=6x+8

Simple and best practice solution for x^2-4=6x+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^2-4=6x+8 equation:


Simplifying
x2 + -4 = 6x + 8

Reorder the terms:
-4 + x2 = 6x + 8

Reorder the terms:
-4 + x2 = 8 + 6x

Solving
-4 + x2 = 8 + 6x

Solving for variable 'x'.

Reorder the terms:
-4 + -8 + -6x + x2 = 8 + 6x + -8 + -6x

Combine like terms: -4 + -8 = -12
-12 + -6x + x2 = 8 + 6x + -8 + -6x

Reorder the terms:
-12 + -6x + x2 = 8 + -8 + 6x + -6x

Combine like terms: 8 + -8 = 0
-12 + -6x + x2 = 0 + 6x + -6x
-12 + -6x + x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-12 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -6x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -6x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -6x + x2 = 0 + 12
-6x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-6x + x2 = 12

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 = 12 + 9

Reorder the terms:
9 + -6x + x2 = 12 + 9

Combine like terms: 12 + 9 = 21
9 + -6x + x2 = 21

Factor a perfect square on the left side:
(x + -3)(x + -3) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(x + -3) equal to 4.582575695 and -4.582575695.

Subproblem 1

x + -3 = 4.582575695 Simplifying x + -3 = 4.582575695 Reorder the terms: -3 + x = 4.582575695 Solving -3 + x = 4.582575695 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 = 4.582575695 + 3 Combine like terms: -3 + 3 = 0 0 + x = 4.582575695 + 3 x = 4.582575695 + 3 Combine like terms: 4.582575695 + 3 = 7.582575695 x = 7.582575695 Simplifying x = 7.582575695

Subproblem 2

x + -3 = -4.582575695 Simplifying x + -3 = -4.582575695 Reorder the terms: -3 + x = -4.582575695 Solving -3 + x = -4.582575695 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 = -4.582575695 + 3 Combine like terms: -3 + 3 = 0 0 + x = -4.582575695 + 3 x = -4.582575695 + 3 Combine like terms: -4.582575695 + 3 = -1.582575695 x = -1.582575695 Simplifying x = -1.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.582575695, -1.582575695}

See similar equations:

| 40.00x-600.00=0 | | 5(3x+3)= | | a-8=8 | | 12(4x-5)=4(12+8) | | 8+4z-6=9z+4-4z | | 7x-5+7x-5+8x= | | 4z+3z=49 | | 4x-5-3x+8= | | 7.8x=54.6 | | 8/3=-7/4+3y | | 22/3=-1.7y+34 | | 5.1q-1.8-5.9q=-1.8q-1.5 | | 6x-(3+8x)=11 | | 12=-75 | | 2y^2-11y+14=0 | | x^2-4xy-y^2=1 | | 9x+7+2(12x+5)=90 | | 9x+7+12x+5=90 | | 4(5y-9)-2(6-y)=62 | | N+6n-44=3b | | 1966+43x=7385-67x | | (x+10)(x-5)=(x+1)(x+1) | | x=2sqrtx | | x=sqrtx | | 3(x)-25=32 | | 21/2-4/5 | | 3(3+2x)-3=36 | | 2/1x^2+6/8(x)+2=0 | | 1/2=c/5 | | x^2+3/5(x)+2/25=0 | | 92=2((2w+1)(w)) | | a+2/9=-10 |

Equations solver categories