0=(3x-1)x-120

Simple and best practice solution for 0=(3x-1)x-120 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 0=(3x-1)x-120 equation:


Simplifying
0 = (3x + -1) * x + -120

Reorder the terms:
0 = (-1 + 3x) * x + -120

Reorder the terms for easier multiplication:
0 = x(-1 + 3x) + -120
0 = (-1 * x + 3x * x) + -120
0 = (-1x + 3x2) + -120

Reorder the terms:
0 = -120 + -1x + 3x2

Solving
0 = -120 + -1x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + 120 = 120
120 + x + -3x2 = -120 + -1x + 3x2 + 120 + x + -3x2

Reorder the terms:
120 + x + -3x2 = -120 + 120 + -1x + x + 3x2 + -3x2

Combine like terms: -120 + 120 = 0
120 + x + -3x2 = 0 + -1x + x + 3x2 + -3x2
120 + x + -3x2 = -1x + x + 3x2 + -3x2

Combine like terms: -1x + x = 0
120 + x + -3x2 = 0 + 3x2 + -3x2
120 + x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
120 + x + -3x2 = 0

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

Divide each side by '-3'.
-40 + -0.3333333333x + x2 = 0

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -0.3333333333x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + -0.3333333333x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -0.3333333333x + x2 = 0 + 40
-0.3333333333x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
-0.3333333333x + x2 = 40

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-0.3333333333x + 0.25 + x2 = 40 + 0.25

Reorder the terms:
0.25 + -0.3333333333x + x2 = 40 + 0.25

Combine like terms: 40 + 0.25 = 40.25
0.25 + -0.3333333333x + x2 = 40.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 40.25

Calculate the square root of the right side: 6.34428877

Break this problem into two subproblems by setting 
(x + 0.5) equal to 6.34428877 and -6.34428877.

Subproblem 1

x + 0.5 = 6.34428877 Simplifying x + 0.5 = 6.34428877 Reorder the terms: 0.5 + x = 6.34428877 Solving 0.5 + x = 6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 6.34428877 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 6.34428877 + -0.5 x = 6.34428877 + -0.5 Combine like terms: 6.34428877 + -0.5 = 5.84428877 x = 5.84428877 Simplifying x = 5.84428877

Subproblem 2

x + 0.5 = -6.34428877 Simplifying x + 0.5 = -6.34428877 Reorder the terms: 0.5 + x = -6.34428877 Solving 0.5 + x = -6.34428877 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -6.34428877 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -6.34428877 + -0.5 x = -6.34428877 + -0.5 Combine like terms: -6.34428877 + -0.5 = -6.84428877 x = -6.84428877 Simplifying x = -6.84428877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.84428877, -6.84428877}

See similar equations:

| G(5)=3n-1 | | -4(4+6x)=104 | | 2(1.6y)-1.33=-1y+4.13 | | 10(3x-1)=8(3x+1)+42 | | 3(1+4n)-4(3-6x)=2 | | .10x+x=121 | | (3)-2n^2= | | -2(8+3x)=-64 | | -7(k+1)-6(3+4k)=68 | | 3(15+4n)-4(3-6x)=25 | | x-8=154-2x | | -14n+1=rt-n | | 2xsquared+6x=185 | | 6.1=7.7-0.2x | | -2n^2= | | -7(-5x+8)=-21 | | 2(3x-4)=3(x+5) | | 24x-12=42-33x | | 8(3x+9)=14 | | 3(15+4n)-4(3-6x)=2 | | 4(3x-5)=x+8 | | .15X+.05(12-X)=.10(-2) | | -2x-19=x-40 | | 7(-2x+9)=21 | | 7(2m+1)=14m+t | | 50h-190=45h | | 79+8p-12=59 | | 2.4c-2=.4+2.4c | | -7x=-8x+4 | | -7(-2x+9)=21 | | s+150=5xa | | (5f+g-2)+-(2f+3)= |

Equations solver categories