3x(x-3)-16=2(x-8)+8

Simple and best practice solution for 3x(x-3)-16=2(x-8)+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 3x(x-3)-16=2(x-8)+8 equation:


Simplifying
3x(x + -3) + -16 = 2(x + -8) + 8

Reorder the terms:
3x(-3 + x) + -16 = 2(x + -8) + 8
(-3 * 3x + x * 3x) + -16 = 2(x + -8) + 8
(-9x + 3x2) + -16 = 2(x + -8) + 8

Reorder the terms:
-16 + -9x + 3x2 = 2(x + -8) + 8

Reorder the terms:
-16 + -9x + 3x2 = 2(-8 + x) + 8
-16 + -9x + 3x2 = (-8 * 2 + x * 2) + 8
-16 + -9x + 3x2 = (-16 + 2x) + 8

Reorder the terms:
-16 + -9x + 3x2 = -16 + 8 + 2x

Combine like terms: -16 + 8 = -8
-16 + -9x + 3x2 = -8 + 2x

Solving
-16 + -9x + 3x2 = -8 + 2x

Solving for variable 'x'.

Reorder the terms:
-16 + 8 + -9x + -2x + 3x2 = -8 + 2x + 8 + -2x

Combine like terms: -16 + 8 = -8
-8 + -9x + -2x + 3x2 = -8 + 2x + 8 + -2x

Combine like terms: -9x + -2x = -11x
-8 + -11x + 3x2 = -8 + 2x + 8 + -2x

Reorder the terms:
-8 + -11x + 3x2 = -8 + 8 + 2x + -2x

Combine like terms: -8 + 8 = 0
-8 + -11x + 3x2 = 0 + 2x + -2x
-8 + -11x + 3x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-8 + -11x + 3x2 = 0

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

Divide each side by '3'.
-2.666666667 + -3.666666667x + x2 = 0

Move the constant term to the right:

Add '2.666666667' to each side of the equation.
-2.666666667 + -3.666666667x + 2.666666667 + x2 = 0 + 2.666666667

Reorder the terms:
-2.666666667 + 2.666666667 + -3.666666667x + x2 = 0 + 2.666666667

Combine like terms: -2.666666667 + 2.666666667 = 0.000000000
0.000000000 + -3.666666667x + x2 = 0 + 2.666666667
-3.666666667x + x2 = 0 + 2.666666667

Combine like terms: 0 + 2.666666667 = 2.666666667
-3.666666667x + x2 = 2.666666667

The x term is -3.666666667x.  Take half its coefficient (-1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
-3.666666667x + 3.361111114 + x2 = 2.666666667 + 3.361111114

Reorder the terms:
3.361111114 + -3.666666667x + x2 = 2.666666667 + 3.361111114

Combine like terms: 2.666666667 + 3.361111114 = 6.027777781
3.361111114 + -3.666666667x + x2 = 6.027777781

Factor a perfect square on the left side:
(x + -1.833333334)(x + -1.833333334) = 6.027777781

Calculate the square root of the right side: 2.455153311

Break this problem into two subproblems by setting 
(x + -1.833333334) equal to 2.455153311 and -2.455153311.

Subproblem 1

x + -1.833333334 = 2.455153311 Simplifying x + -1.833333334 = 2.455153311 Reorder the terms: -1.833333334 + x = 2.455153311 Solving -1.833333334 + x = 2.455153311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 2.455153311 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 2.455153311 + 1.833333334 x = 2.455153311 + 1.833333334 Combine like terms: 2.455153311 + 1.833333334 = 4.288486645 x = 4.288486645 Simplifying x = 4.288486645

Subproblem 2

x + -1.833333334 = -2.455153311 Simplifying x + -1.833333334 = -2.455153311 Reorder the terms: -1.833333334 + x = -2.455153311 Solving -1.833333334 + x = -2.455153311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -2.455153311 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -2.455153311 + 1.833333334 x = -2.455153311 + 1.833333334 Combine like terms: -2.455153311 + 1.833333334 = -0.621819977 x = -0.621819977 Simplifying x = -0.621819977

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.288486645, -0.621819977}

See similar equations:

| 2x+x+4x=91 | | 16+a=5 | | 4xy=60 | | 4x^2+5x^2=19 | | -2*8+9=y | | 5x-7(-5+15)=15 | | -0.7x+4-0.9x=2.8 | | -3x^2-23x-120= | | 3y-16=6 | | 5a+2=23 | | -13x-y=39 | | 4*-2+11=m | | (x-30)=(3x-130) | | 7(6y-8)= | | 4p-2=2p+2 | | 3x-1+6x=-33+33x | | 12b=20 | | f(x)=50cos(7x^7) | | ln(5x-1)-ln(x)=3 | | -3x-13=-52 | | 3a+8=56-5a | | 2d-12=d+13 | | 2p-5=3 | | 6x+13=-47 | | 3(4x+2)=6x+24 | | y-50=-5.666(x-10) | | 18x-6+6x=-198+198x | | 3x-4=15+2x | | 8(x+7)=8(x+15) | | 10x-16=7x+11 | | 1.5-3X=-4.5 | | -5x-12=-72 |

Equations solver categories