x^2+810x=3240

Simple and best practice solution for x^2+810x=3240 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+810x=3240 equation:


Simplifying
x2 + 810x = 3240

Reorder the terms:
810x + x2 = 3240

Solving
810x + x2 = 3240

Solving for variable 'x'.

Reorder the terms:
-3240 + 810x + x2 = 3240 + -3240

Combine like terms: 3240 + -3240 = 0
-3240 + 810x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3240' to each side of the equation.
-3240 + 810x + 3240 + x2 = 0 + 3240

Reorder the terms:
-3240 + 3240 + 810x + x2 = 0 + 3240

Combine like terms: -3240 + 3240 = 0
0 + 810x + x2 = 0 + 3240
810x + x2 = 0 + 3240

Combine like terms: 0 + 3240 = 3240
810x + x2 = 3240

The x term is 810x.  Take half its coefficient (405).
Square it (164025) and add it to both sides.

Add '164025' to each side of the equation.
810x + 164025 + x2 = 3240 + 164025

Reorder the terms:
164025 + 810x + x2 = 3240 + 164025

Combine like terms: 3240 + 164025 = 167265
164025 + 810x + x2 = 167265

Factor a perfect square on the left side:
(x + 405)(x + 405) = 167265

Calculate the square root of the right side: 408.98043963

Break this problem into two subproblems by setting 
(x + 405) equal to 408.98043963 and -408.98043963.

Subproblem 1

x + 405 = 408.98043963 Simplifying x + 405 = 408.98043963 Reorder the terms: 405 + x = 408.98043963 Solving 405 + x = 408.98043963 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-405' to each side of the equation. 405 + -405 + x = 408.98043963 + -405 Combine like terms: 405 + -405 = 0 0 + x = 408.98043963 + -405 x = 408.98043963 + -405 Combine like terms: 408.98043963 + -405 = 3.98043963 x = 3.98043963 Simplifying x = 3.98043963

Subproblem 2

x + 405 = -408.98043963 Simplifying x + 405 = -408.98043963 Reorder the terms: 405 + x = -408.98043963 Solving 405 + x = -408.98043963 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-405' to each side of the equation. 405 + -405 + x = -408.98043963 + -405 Combine like terms: 405 + -405 = 0 0 + x = -408.98043963 + -405 x = -408.98043963 + -405 Combine like terms: -408.98043963 + -405 = -813.98043963 x = -813.98043963 Simplifying x = -813.98043963

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.98043963, -813.98043963}

See similar equations:

| 22y^2-15y=0 | | -20=-7b+1 | | 4(2+n)=16 | | 2x-6+4x+10+4x+6=180 | | 16x^2-40x-39=0 | | 7m-2=-54 | | 5x^2=-6+4x | | -3[x-5]+6x=-45 | | 3k+10=15-2k | | 53+X-19=58 | | 7p^2+4=-8p | | 5n^2+11n+6=0 | | x+y^2-4y=0 | | 4x^2-5x^3-6x^2=0 | | 2x+2=5x-3 | | 8+4xp= | | (6x-1)-7=0 | | k^2=99+2k | | -2[x-6]=-32 | | 0.50x+0.35(30)=24.5 | | 9(4x-5)=-1521 | | 53+x-10=58 | | 129=-3(-7a-8) | | -6(1-6n)=138 | | 0.75x+0.05(2-x)=0.10(127) | | 18,069,333.333=1/3(440)(440)h | | 18x-5+4x-2+6x=77 | | 3x+4=x+4 | | -1+6+3+-3= | | -45=3d+2d | | 2(p+1)=6 | | -45=3d+2f |

Equations solver categories