3x^2-5-15x^2+12+6x=

Simple and best practice solution for 3x^2-5-15x^2+12+6x= 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^2-5-15x^2+12+6x= equation:


Simplifying
3x2 + -5 + -15x2 + 12 + 6x = 0

Reorder the terms:
-5 + 12 + 6x + 3x2 + -15x2 = 0

Combine like terms: -5 + 12 = 7
7 + 6x + 3x2 + -15x2 = 0

Combine like terms: 3x2 + -15x2 = -12x2
7 + 6x + -12x2 = 0

Solving
7 + 6x + -12x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-12 the coefficient of the squared term: 

Divide each side by '-12'.
-0.5833333333 + -0.5x + x2 = 0

Move the constant term to the right:

Add '0.5833333333' to each side of the equation.
-0.5833333333 + -0.5x + 0.5833333333 + x2 = 0 + 0.5833333333

Reorder the terms:
-0.5833333333 + 0.5833333333 + -0.5x + x2 = 0 + 0.5833333333

Combine like terms: -0.5833333333 + 0.5833333333 = 0.0000000000
0.0000000000 + -0.5x + x2 = 0 + 0.5833333333
-0.5x + x2 = 0 + 0.5833333333

Combine like terms: 0 + 0.5833333333 = 0.5833333333
-0.5x + x2 = 0.5833333333

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 0.5833333333 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 0.5833333333 + 0.0625

Combine like terms: 0.5833333333 + 0.0625 = 0.6458333333
0.0625 + -0.5x + x2 = 0.6458333333

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 0.6458333333

Calculate the square root of the right side: 0.803637563

Break this problem into two subproblems by setting 
(x + -0.25) equal to 0.803637563 and -0.803637563.

Subproblem 1

x + -0.25 = 0.803637563 Simplifying x + -0.25 = 0.803637563 Reorder the terms: -0.25 + x = 0.803637563 Solving -0.25 + x = 0.803637563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.803637563 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.803637563 + 0.25 x = 0.803637563 + 0.25 Combine like terms: 0.803637563 + 0.25 = 1.053637563 x = 1.053637563 Simplifying x = 1.053637563

Subproblem 2

x + -0.25 = -0.803637563 Simplifying x + -0.25 = -0.803637563 Reorder the terms: -0.25 + x = -0.803637563 Solving -0.25 + x = -0.803637563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.803637563 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.803637563 + 0.25 x = -0.803637563 + 0.25 Combine like terms: -0.803637563 + 0.25 = -0.553637563 x = -0.553637563 Simplifying x = -0.553637563

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.053637563, -0.553637563}

See similar equations:

| X+(X-4000)=61200 | | (3x-5)+(19-x)=2x | | 3/4n-18=1/4n-4 | | 7m+5-8=11 | | 15-3=-18 | | -7p-12=-4p+3(-4-p) | | 26y=910 | | 3x-6+5=6(2x-3) | | .3/(2/9)= | | 3x^2y^2+6x^2+12y^2+24=0 | | 2(4x-1)+5(x+4)=31 | | (2x)+(x+31.5)=123 | | -6x+3y+2=14 | | 5g-5-3-5g= | | 15y+3=36 | | 142=x-38 | | 27=5y-63 | | 6-2y=5x | | 3h+1=37 | | 4(9x-8)+15x= | | -1.04-.96c=3.44 | | r+30=-214 | | X^2+1x+30=180 | | 4x+3(2x+5)=-5(x+3) | | 74=x+137 | | 448=(x+2)(3x-4) | | 4v-7v+10=1 | | -3.2-2f=14.84 | | 27h+25=-29 | | 306=m+198 | | -9=7a-48 | | 6x+4+5(x+2)+3= |

Equations solver categories