-x(-x-9)=x-6

Simple and best practice solution for -x(-x-9)=x-6 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(-x-9)=x-6 equation:


Simplifying
-1x(-1x + -9) = x + -6

Reorder the terms:
-1x(-9 + -1x) = x + -6
(-9 * -1x + -1x * -1x) = x + -6
(9x + 1x2) = x + -6

Reorder the terms:
9x + 1x2 = -6 + x

Solving
9x + 1x2 = -6 + x

Solving for variable 'x'.

Reorder the terms:
6 + 9x + -1x + 1x2 = -6 + x + 6 + -1x

Combine like terms: 9x + -1x = 8x
6 + 8x + 1x2 = -6 + x + 6 + -1x

Reorder the terms:
6 + 8x + 1x2 = -6 + 6 + x + -1x

Combine like terms: -6 + 6 = 0
6 + 8x + 1x2 = 0 + x + -1x
6 + 8x + 1x2 = x + -1x

Combine like terms: x + -1x = 0
6 + 8x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 8x + -6 + x2 = 0 + -6

Reorder the terms:
6 + -6 + 8x + x2 = 0 + -6

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

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

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -6 + 16

Reorder the terms:
16 + 8x + x2 = -6 + 16

Combine like terms: -6 + 16 = 10
16 + 8x + x2 = 10

Factor a perfect square on the left side:
(x + 4)(x + 4) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(x + 4) equal to 3.16227766 and -3.16227766.

Subproblem 1

x + 4 = 3.16227766 Simplifying x + 4 = 3.16227766 Reorder the terms: 4 + x = 3.16227766 Solving 4 + x = 3.16227766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + x = 3.16227766 + -4 x = 3.16227766 + -4 Combine like terms: 3.16227766 + -4 = -0.83772234 x = -0.83772234 Simplifying x = -0.83772234

Subproblem 2

x + 4 = -3.16227766 Simplifying x + 4 = -3.16227766 Reorder the terms: 4 + x = -3.16227766 Solving 4 + x = -3.16227766 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + x = -3.16227766 + -4 x = -3.16227766 + -4 Combine like terms: -3.16227766 + -4 = -7.16227766 x = -7.16227766 Simplifying x = -7.16227766

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.83772234, -7.16227766}

See similar equations:

| I-3(4+2a)=-29 | | -8q=96 | | 34=-3(5c+7) | | 9(8n+4)=17-7n | | 6x(x+4)=x-15 | | -4=b | | 7(2v+8)=-27 | | 4m^2-93=19m | | 7x=2x+18 | | -35=6h-3h | | 63=45-2a | | 10a^3-29a^2-21a=0 | | 2x+34=54 | | 2+9*6-3+9*1*0= | | .25x+.75x=335 | | -33+5x=3(7x+9) | | logy=2t+4 | | 2x-300=500 | | -8m^2=-185-3m | | x+3x=336 | | 4p^3+20p^2-45=9p | | ln^2x-4=0 | | 5y+6+9y=28 | | -4w-2w= | | 100[0.06(p+9)]= | | 3n^7-21n^4-30n^3=0 | | 6b+2b=-34 | | -2(x-3)+8=4(x-1) | | 4x-9y=-42 | | 10n^2+n=255 | | 58x=-145 | | 3(3q-4)=2(2q+4) |

Equations solver categories