x^2-9x=-6

Simple and best practice solution for x^2-9x=-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^2-9x=-6 equation:


Simplifying
x2 + -9x = -6

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

Solving
-9x + x2 = -6

Solving for variable 'x'.

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

Combine like terms: -6 + 6 = 0
6 + -9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + -9x + -6 + x2 = 0 + -6

Reorder the terms:
6 + -6 + -9x + x2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -9x + x2 = 0 + -6
-9x + x2 = 0 + -6

Combine like terms: 0 + -6 = -6
-9x + x2 = -6

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = -6 + 20.25

Reorder the terms:
20.25 + -9x + x2 = -6 + 20.25

Combine like terms: -6 + 20.25 = 14.25
20.25 + -9x + x2 = 14.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(x + -4.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

x + -4.5 = 3.774917218 Simplifying x + -4.5 = 3.774917218 Reorder the terms: -4.5 + x = 3.774917218 Solving -4.5 + x = 3.774917218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 3.774917218 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 3.774917218 + 4.5 x = 3.774917218 + 4.5 Combine like terms: 3.774917218 + 4.5 = 8.274917218 x = 8.274917218 Simplifying x = 8.274917218

Subproblem 2

x + -4.5 = -3.774917218 Simplifying x + -4.5 = -3.774917218 Reorder the terms: -4.5 + x = -3.774917218 Solving -4.5 + x = -3.774917218 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -3.774917218 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -3.774917218 + 4.5 x = -3.774917218 + 4.5 Combine like terms: -3.774917218 + 4.5 = 0.725082782 x = 0.725082782 Simplifying x = 0.725082782

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.274917218, 0.725082782}

See similar equations:

| 77-68p+24p=-11 | | 5x+9=21 | | 5x+30y= | | 8(2+3s)= | | (5x-1)*(5x-1)-(3x+2)(5x-1)=0 | | 2x=3x-3 | | 5[m(3+n)]= | | y-5=-3 | | 3(7x+5)=5(4x+3)-17 | | (30-2x)(24-2x)=0 | | 7x-6=6x+2 | | -2d^2-7d-5=0 | | z+18=5 | | s+5t= | | 8r^2=12r | | 3(y+4)-7y=-4 | | 3c+21c=168 | | 4x+3=2x+1(2) | | -18=5(v-2)-3v | | 7m+9m=96 | | 4a-9=a+24 | | 11m+9m=96 | | -2+5v=-2 | | 2x^3-6x^2+4x=0 | | 25x^2+121=0 | | x^2-7x+8=0 | | 5z+13=4z+4 | | 2r-1.6=-2r-5.6 | | 2x^3-6x+4x=0 | | 3x^3-19x^2+16x-60=0 | | -6x-2=x-51 | | 5x+17=14x-73 |

Equations solver categories