x^2+9x-324=0

Simple and best practice solution for x^2+9x-324=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 x^2+9x-324=0 equation:


Simplifying
x2 + 9x + -324 = 0

Reorder the terms:
-324 + 9x + x2 = 0

Solving
-324 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '324' to each side of the equation.
-324 + 9x + 324 + x2 = 0 + 324

Reorder the terms:
-324 + 324 + 9x + x2 = 0 + 324

Combine like terms: -324 + 324 = 0
0 + 9x + x2 = 0 + 324
9x + x2 = 0 + 324

Combine like terms: 0 + 324 = 324
9x + x2 = 324

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 = 324 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 324 + 20.25

Combine like terms: 324 + 20.25 = 344.25
20.25 + 9x + x2 = 344.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 344.25

Calculate the square root of the right side: 18.553975315

Break this problem into two subproblems by setting 
(x + 4.5) equal to 18.553975315 and -18.553975315.

Subproblem 1

x + 4.5 = 18.553975315 Simplifying x + 4.5 = 18.553975315 Reorder the terms: 4.5 + x = 18.553975315 Solving 4.5 + x = 18.553975315 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 = 18.553975315 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 18.553975315 + -4.5 x = 18.553975315 + -4.5 Combine like terms: 18.553975315 + -4.5 = 14.053975315 x = 14.053975315 Simplifying x = 14.053975315

Subproblem 2

x + 4.5 = -18.553975315 Simplifying x + 4.5 = -18.553975315 Reorder the terms: 4.5 + x = -18.553975315 Solving 4.5 + x = -18.553975315 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 = -18.553975315 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -18.553975315 + -4.5 x = -18.553975315 + -4.5 Combine like terms: -18.553975315 + -4.5 = -23.053975315 x = -23.053975315 Simplifying x = -23.053975315

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.053975315, -23.053975315}

See similar equations:

| -3h=18-27h | | -8(m-2)+6(2m+4)=3(m+3)+3 | | 6x+2=7x-4 | | 5(x-6)-7(x+2)=10 | | 6(3+6x)-3=87 | | 3x+2(x-4)=32 | | 6+-2x=-5x+9x-4 | | 9x+4=5x-8 | | 4(x^2-8)=64 | | 1.8z=0.3z | | 3j+12=-2+j | | v^2-v-30=0 | | 7v+2=7-6v | | 7x+7=2x+32 | | 3+8x=51 | | t^2+4t+1=0 | | x(4x+19)=(2x+5)(2x+5) | | 2x+10=9+10-x | | 5x+15=0 | | x^2-8x=-9.8 | | 4x+44+32y= | | 6-2x=5x-9x+4 | | 5y+7=27 | | 6-2x+5x=-9x+4 | | x^2+12x=85 | | 6x+42+18x-12=180 | | x^2+1.5x-1=0 | | -4x^3+3x^2-10= | | 12x=-36+6x | | (x-5.3)(x-5.3)=25 | | -31x-(18+3x)=38 | | 3x+[-3x]= |

Equations solver categories