9x+x^2-225=0

Simple and best practice solution for 9x+x^2-225=0 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 9x+x^2-225=0 equation:


Simplifying
9x + x2 + -225 = 0

Reorder the terms:
-225 + 9x + x2 = 0

Solving
-225 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '225' to each side of the equation.
-225 + 9x + 225 + x2 = 0 + 225

Reorder the terms:
-225 + 225 + 9x + x2 = 0 + 225

Combine like terms: -225 + 225 = 0
0 + 9x + x2 = 0 + 225
9x + x2 = 0 + 225

Combine like terms: 0 + 225 = 225
9x + x2 = 225

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 = 225 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 225 + 20.25

Combine like terms: 225 + 20.25 = 245.25
20.25 + 9x + x2 = 245.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 245.25

Calculate the square root of the right side: 15.660459763

Break this problem into two subproblems by setting 
(x + 4.5) equal to 15.660459763 and -15.660459763.

Subproblem 1

x + 4.5 = 15.660459763 Simplifying x + 4.5 = 15.660459763 Reorder the terms: 4.5 + x = 15.660459763 Solving 4.5 + x = 15.660459763 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 = 15.660459763 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 15.660459763 + -4.5 x = 15.660459763 + -4.5 Combine like terms: 15.660459763 + -4.5 = 11.160459763 x = 11.160459763 Simplifying x = 11.160459763

Subproblem 2

x + 4.5 = -15.660459763 Simplifying x + 4.5 = -15.660459763 Reorder the terms: 4.5 + x = -15.660459763 Solving 4.5 + x = -15.660459763 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 = -15.660459763 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -15.660459763 + -4.5 x = -15.660459763 + -4.5 Combine like terms: -15.660459763 + -4.5 = -20.160459763 x = -20.160459763 Simplifying x = -20.160459763

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.160459763, -20.160459763}

See similar equations:

| 2v+2=3v+4 | | 9s+14s= | | t=cs | | y=5y+40 | | I=200*0.14*2 | | P=2(92)+2(125) | | x-279=239 | | D=y+v+z/3 | | 6x+18=15x-72 | | 3a^2y-6ay= | | f=9/535+32 | | 3h+11=38 | | 15b^2+10b=0 | | x-8=x/2-x-6/3 | | 2y+x=10+2x | | (p+30)+(4p-36)+p=822 | | 116=15c+11 | | (7/(27-12))+1=(-4/(y-6)) | | -4-13=11-8x | | (7/2y-12)+1=(-4/y-6) | | 5q+2q-1q= | | 1/2-78*65=436-76 | | x+x+30+2x-36=822 | | 1/1-78*65=436-76 | | 2q-1q= | | 5/3-x=13 | | 5x-56=102 | | 7x-121=3x-5 | | 5x+20=13x-28 | | 8(v+2)-2v=3(2v+3)-14 | | a-10-a=5 | | 2x+30=6x+74 |

Equations solver categories