(x^2-9)=11x

Simple and best practice solution for (x^2-9)=11x 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^2-9)=11x equation:


Simplifying
(x2 + -9) = 11x

Reorder the terms:
(-9 + x2) = 11x

Remove parenthesis around (-9 + x2)
-9 + x2 = 11x

Solving
-9 + x2 = 11x

Solving for variable 'x'.

Reorder the terms:
-9 + -11x + x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
-9 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -11x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -11x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -11x + x2 = 0 + 9
-11x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-11x + x2 = 9

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = 9 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 9 + 30.25

Combine like terms: 9 + 30.25 = 39.25
30.25 + -11x + x2 = 39.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 39.25

Calculate the square root of the right side: 6.264982043

Break this problem into two subproblems by setting 
(x + -5.5) equal to 6.264982043 and -6.264982043.

Subproblem 1

x + -5.5 = 6.264982043 Simplifying x + -5.5 = 6.264982043 Reorder the terms: -5.5 + x = 6.264982043 Solving -5.5 + x = 6.264982043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 6.264982043 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 6.264982043 + 5.5 x = 6.264982043 + 5.5 Combine like terms: 6.264982043 + 5.5 = 11.764982043 x = 11.764982043 Simplifying x = 11.764982043

Subproblem 2

x + -5.5 = -6.264982043 Simplifying x + -5.5 = -6.264982043 Reorder the terms: -5.5 + x = -6.264982043 Solving -5.5 + x = -6.264982043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -6.264982043 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -6.264982043 + 5.5 x = -6.264982043 + 5.5 Combine like terms: -6.264982043 + 5.5 = -0.764982043 x = -0.764982043 Simplifying x = -0.764982043

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.764982043, -0.764982043}

See similar equations:

| X^2-23x+144=0 | | 1x-1-3x=6 | | 5ln(x)=25 | | 9y-8=16-4y | | 7-m=0 | | ax+c-bx=d | | 2x+7=-(3-2x) | | .7x+.3(3-x)=3 | | 3(x^2)-5x+2=0 | | X^2+6x+(e^2-8)=0 | | 2x^3-7x^2-7x+12=0 | | Y=400x+1200 | | 3(x+7)=9-2(2x-2) | | 10x-36-38x-47=0 | | 3/5(1/6p+7/9)=0 | | 1990x-173y=11 | | 2y=18-4y | | x^2+5-2=0 | | 4a^2-5ab+b^2=0 | | 3z-m=z+b | | 5(x-18)= | | 3z-m=z+bx | | g(x)=6x+3 | | 5x-(2x+2)=4x+8 | | 10x+4=4x-8 | | .7(5x+5)=1.1-(x+3) | | 8x+84=2x | | 1x=2y-9 | | 4x^3+5x^2+144x+180=0 | | 8(5x-7)+10x= | | .5n+15=9 | | -9=2u+3 |

Equations solver categories