(x^2)-4x=36

Simple and best practice solution for (x^2)-4x=36 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)-4x=36 equation:


Simplifying
(x2) + -4x = 36
x2 + -4x = 36

Reorder the terms:
-4x + x2 = 36

Solving
-4x + x2 = 36

Solving for variable 'x'.

Reorder the terms:
-36 + -4x + x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -4x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + -4x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -4x + x2 = 0 + 36
-4x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
-4x + x2 = 36

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 36 + 4

Reorder the terms:
4 + -4x + x2 = 36 + 4

Combine like terms: 36 + 4 = 40
4 + -4x + x2 = 40

Factor a perfect square on the left side:
(x + -2)(x + -2) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(x + -2) equal to 6.32455532 and -6.32455532.

Subproblem 1

x + -2 = 6.32455532 Simplifying x + -2 = 6.32455532 Reorder the terms: -2 + x = 6.32455532 Solving -2 + x = 6.32455532 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 6.32455532 + 2 Combine like terms: -2 + 2 = 0 0 + x = 6.32455532 + 2 x = 6.32455532 + 2 Combine like terms: 6.32455532 + 2 = 8.32455532 x = 8.32455532 Simplifying x = 8.32455532

Subproblem 2

x + -2 = -6.32455532 Simplifying x + -2 = -6.32455532 Reorder the terms: -2 + x = -6.32455532 Solving -2 + x = -6.32455532 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -6.32455532 + 2 Combine like terms: -2 + 2 = 0 0 + x = -6.32455532 + 2 x = -6.32455532 + 2 Combine like terms: -6.32455532 + 2 = -4.32455532 x = -4.32455532 Simplifying x = -4.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.32455532, -4.32455532}

See similar equations:

| 4.6x+2.1=15.9 | | Qy=z | | 14x-19=12x+35 | | Yq=z | | 2x-5(7-4x)=9 | | 2x^2+40=-72 | | -5(3+-5)+7= | | Ym=z | | 3.88x+4.44=16.08 | | 4+5x-3=7+3(x-1) | | 3x^2-69=0 | | C+2BE+2a= | | 73p-(42p-38)= | | 3/8*2/1 | | 24+2x=3x+2[3*4] | | 10x+17=617 | | 2(x+2)+2=2x+5 | | -(82c-62d+20)= | | 2x^3-4x-13=0 | | 2x^2+18x= | | -(7+-5)+11= | | 3-20-17= | | 0.5x+5=26 | | 100x+y=4200 | | 30+5x=4+12x | | 5x+(-14)= | | 2c=b | | Gp=a | | 13-39=26 | | Hm=d | | 3[x-2]=30+x-2-x+2 | | 5(3x-7)-5=5(x-3)+25 |

Equations solver categories