x^2-12=8(3x)

Simple and best practice solution for x^2-12=8(3x) 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^2-12=8(3x) equation:


Simplifying
x2 + -12 = 8(3x)

Reorder the terms:
-12 + x2 = 8(3x)

Remove parenthesis around (3x)
-12 + x2 = 8 * 3x

Multiply 8 * 3
-12 + x2 = 24x

Solving
-12 + x2 = 24x

Solving for variable 'x'.

Reorder the terms:
-12 + -24x + x2 = 24x + -24x

Combine like terms: 24x + -24x = 0
-12 + -24x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -24x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -24x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -24x + x2 = 0 + 12
-24x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-24x + x2 = 12

The x term is -24x.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24x + 144 + x2 = 12 + 144

Reorder the terms:
144 + -24x + x2 = 12 + 144

Combine like terms: 12 + 144 = 156
144 + -24x + x2 = 156

Factor a perfect square on the left side:
(x + -12)(x + -12) = 156

Calculate the square root of the right side: 12.489995997

Break this problem into two subproblems by setting 
(x + -12) equal to 12.489995997 and -12.489995997.

Subproblem 1

x + -12 = 12.489995997 Simplifying x + -12 = 12.489995997 Reorder the terms: -12 + x = 12.489995997 Solving -12 + x = 12.489995997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = 12.489995997 + 12 Combine like terms: -12 + 12 = 0 0 + x = 12.489995997 + 12 x = 12.489995997 + 12 Combine like terms: 12.489995997 + 12 = 24.489995997 x = 24.489995997 Simplifying x = 24.489995997

Subproblem 2

x + -12 = -12.489995997 Simplifying x + -12 = -12.489995997 Reorder the terms: -12 + x = -12.489995997 Solving -12 + x = -12.489995997 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = -12.489995997 + 12 Combine like terms: -12 + 12 = 0 0 + x = -12.489995997 + 12 x = -12.489995997 + 12 Combine like terms: -12.489995997 + 12 = -0.489995997 x = -0.489995997 Simplifying x = -0.489995997

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.489995997, -0.489995997}

See similar equations:

| x^2-12=8 | | 2x^2-20=142 | | 7/8*9 | | 26-n=5n-8(3+7n) | | x=500y^2-500y | | 14-y=21 | | x-50=17 | | 8(m+3)=36+6m | | y=500x^2-500x | | 5+2i=(2-i)(m+in) | | 38+8k=2(8k+3) | | 5(8x-5)-8(x-4)=39 | | -329=7(1-6r) | | (x-3)(x-3)=45 | | p-18=55/9h-30/9 | | 2x-(5x-9)= | | 37=8(1-3x)-5(8x+7) | | 3x+4/5y=18 | | 2x^2-7w-72=0 | | -12x^2+48x=0 | | 4x^2-w-60=0 | | 1/3(6x+14)+1/3 | | 6+4(1-2x)=34-4x | | -3+2cos(x)=0 | | -6(0.1x+0.2)-2.1=-0.3 | | 90=(m*8.5)+c | | p-30=55/9h-7 | | 4x^2-12w-60=0 | | 5r-8(4r+2)=10-r | | 3*6-d=18 | | x=-3x^2+6x+7 | | 6x-r(4x^2-20x+17)=15 |

Equations solver categories