(2x^2-6x+18)-(8x^2-11x-4)=

Simple and best practice solution for (2x^2-6x+18)-(8x^2-11x-4)= 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 (2x^2-6x+18)-(8x^2-11x-4)= equation:


Simplifying
(2x2 + -6x + 18) + -1(8x2 + -11x + -4) = 0

Reorder the terms:
(18 + -6x + 2x2) + -1(8x2 + -11x + -4) = 0

Remove parenthesis around (18 + -6x + 2x2)
18 + -6x + 2x2 + -1(8x2 + -11x + -4) = 0

Reorder the terms:
18 + -6x + 2x2 + -1(-4 + -11x + 8x2) = 0
18 + -6x + 2x2 + (-4 * -1 + -11x * -1 + 8x2 * -1) = 0
18 + -6x + 2x2 + (4 + 11x + -8x2) = 0

Reorder the terms:
18 + 4 + -6x + 11x + 2x2 + -8x2 = 0

Combine like terms: 18 + 4 = 22
22 + -6x + 11x + 2x2 + -8x2 = 0

Combine like terms: -6x + 11x = 5x
22 + 5x + 2x2 + -8x2 = 0

Combine like terms: 2x2 + -8x2 = -6x2
22 + 5x + -6x2 = 0

Solving
22 + 5x + -6x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-3.666666667 + -0.8333333333x + x2 = 0

Move the constant term to the right:

Add '3.666666667' to each side of the equation.
-3.666666667 + -0.8333333333x + 3.666666667 + x2 = 0 + 3.666666667

Reorder the terms:
-3.666666667 + 3.666666667 + -0.8333333333x + x2 = 0 + 3.666666667

Combine like terms: -3.666666667 + 3.666666667 = 0.000000000
0.000000000 + -0.8333333333x + x2 = 0 + 3.666666667
-0.8333333333x + x2 = 0 + 3.666666667

Combine like terms: 0 + 3.666666667 = 3.666666667
-0.8333333333x + x2 = 3.666666667

The x term is -0.8333333333x.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x + 0.1736111111 + x2 = 3.666666667 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x + x2 = 3.666666667 + 0.1736111111

Combine like terms: 3.666666667 + 0.1736111111 = 3.8402777781
0.1736111111 + -0.8333333333x + x2 = 3.8402777781

Factor a perfect square on the left side:
(x + -0.4166666667)(x + -0.4166666667) = 3.8402777781

Calculate the square root of the right side: 1.959662669

Break this problem into two subproblems by setting 
(x + -0.4166666667) equal to 1.959662669 and -1.959662669.

Subproblem 1

x + -0.4166666667 = 1.959662669 Simplifying x + -0.4166666667 = 1.959662669 Reorder the terms: -0.4166666667 + x = 1.959662669 Solving -0.4166666667 + x = 1.959662669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = 1.959662669 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = 1.959662669 + 0.4166666667 x = 1.959662669 + 0.4166666667 Combine like terms: 1.959662669 + 0.4166666667 = 2.3763293357 x = 2.3763293357 Simplifying x = 2.3763293357

Subproblem 2

x + -0.4166666667 = -1.959662669 Simplifying x + -0.4166666667 = -1.959662669 Reorder the terms: -0.4166666667 + x = -1.959662669 Solving -0.4166666667 + x = -1.959662669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = -1.959662669 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = -1.959662669 + 0.4166666667 x = -1.959662669 + 0.4166666667 Combine like terms: -1.959662669 + 0.4166666667 = -1.5429960023 x = -1.5429960023 Simplifying x = -1.5429960023

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3763293357, -1.5429960023}

See similar equations:

| X^2-9= | | (6x^2+5x-15)+(10x+15)= | | 3n^2+19=382 | | 3x^2-12x+8=0 | | 0=12x^2-1 | | 3t=t^2-28 | | 3t=r^2-28 | | x^2+4x+11=14 | | 12x^4+7x^3+2x^2+7x-10=0 | | m^2+8m+12=0 | | x^2-7x-12=0 | | x^2+8x+16=0 | | x^2+8x+24=0 | | x^2+11x+24=0 | | x^2+6x+27=0 | | p^2-p-30=0 | | x^2+4x-32=0 | | m^2+m-20=0 | | x^2-x-45=0 | | x^2+2x-24=0 | | x^2+10x+21=0 | | x^2+4x+12=0 | | x^2+11x+28=0 | | x^2+13x+30=0 | | x^2+x-6=0 | | x^2-7x+12=0 | | x^2+2x-15=0 | | x^2-6x=0 | | 7-3X=8X^2 | | 112x-16x^2=0 | | 2x^2=72 | | (2x^2)-5x+6x-15=0 |

Equations solver categories