x^2+12x=25

Simple and best practice solution for x^2+12x=25 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+12x=25 equation:


Simplifying
x2 + 12x = 25

Reorder the terms:
12x + x2 = 25

Solving
12x + x2 = 25

Solving for variable 'x'.

Reorder the terms:
-25 + 12x + x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 12x + 25 + x2 = 0 + 25

Reorder the terms:
-25 + 25 + 12x + x2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 12x + x2 = 0 + 25
12x + x2 = 0 + 25

Combine like terms: 0 + 25 = 25
12x + x2 = 25

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 25 + 36

Reorder the terms:
36 + 12x + x2 = 25 + 36

Combine like terms: 25 + 36 = 61
36 + 12x + x2 = 61

Factor a perfect square on the left side:
(x + 6)(x + 6) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(x + 6) equal to 7.810249676 and -7.810249676.

Subproblem 1

x + 6 = 7.810249676 Simplifying x + 6 = 7.810249676 Reorder the terms: 6 + x = 7.810249676 Solving 6 + x = 7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 7.810249676 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.810249676 + -6 x = 7.810249676 + -6 Combine like terms: 7.810249676 + -6 = 1.810249676 x = 1.810249676 Simplifying x = 1.810249676

Subproblem 2

x + 6 = -7.810249676 Simplifying x + 6 = -7.810249676 Reorder the terms: 6 + x = -7.810249676 Solving 6 + x = -7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -7.810249676 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.810249676 + -6 x = -7.810249676 + -6 Combine like terms: -7.810249676 + -6 = -13.810249676 x = -13.810249676 Simplifying x = -13.810249676

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.810249676, -13.810249676}

See similar equations:

| -8(2n-4)+5=43 | | -2(620n)=20(2n-3) | | y=4x-9(8) | | (4y+3)(y+2)= | | 2-3x=5x-6 | | 90x+180=120x | | 2x^2-14x=60 | | 48k^3-147k=245-80k^2 | | 29-17p=56 | | 3z*2z^2= | | 2(x+1)-3=35 | | 7x+2=4x+17 | | 4(x+5)=9x-5 | | 5(x+4)-3=74 | | 7(x+3)=4x-9 | | 96=8x | | m=2m+2w | | -2x-6=3x+29 | | m=2t+2w | | 36x^2-24x+4= | | 3x+2(6-1.5x)=12 | | 60=9x | | 4(4x-1.8)=8x-7.2 | | t=2m+2w | | n=4r | | 2x+x+3x=5x | | 3z(2z^2+z+4)= | | 143n^3-41n^2=30n^2+30n | | -0.3x+4.46=-.5x+4.26 | | (2x+1)=5x-3 | | 3p+7+3=p+(-2) | | 3x-8(-3+5x)=24 |

Equations solver categories