x^2+12x+13.5=0

Simple and best practice solution for x^2+12x+13.5=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+12x+13.5=0 equation:


Simplifying
x2 + 12x + 13.5 = 0

Reorder the terms:
13.5 + 12x + x2 = 0

Solving
13.5 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-13.5' to each side of the equation.
13.5 + 12x + -13.5 + x2 = 0 + -13.5

Reorder the terms:
13.5 + -13.5 + 12x + x2 = 0 + -13.5

Combine like terms: 13.5 + -13.5 = 0.0
0.0 + 12x + x2 = 0 + -13.5
12x + x2 = 0 + -13.5

Combine like terms: 0 + -13.5 = -13.5
12x + x2 = -13.5

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 = -13.5 + 36

Reorder the terms:
36 + 12x + x2 = -13.5 + 36

Combine like terms: -13.5 + 36 = 22.5
36 + 12x + x2 = 22.5

Factor a perfect square on the left side:
(x + 6)(x + 6) = 22.5

Calculate the square root of the right side: 4.74341649

Break this problem into two subproblems by setting 
(x + 6) equal to 4.74341649 and -4.74341649.

Subproblem 1

x + 6 = 4.74341649 Simplifying x + 6 = 4.74341649 Reorder the terms: 6 + x = 4.74341649 Solving 6 + x = 4.74341649 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 = 4.74341649 + -6 Combine like terms: 6 + -6 = 0 0 + x = 4.74341649 + -6 x = 4.74341649 + -6 Combine like terms: 4.74341649 + -6 = -1.25658351 x = -1.25658351 Simplifying x = -1.25658351

Subproblem 2

x + 6 = -4.74341649 Simplifying x + 6 = -4.74341649 Reorder the terms: 6 + x = -4.74341649 Solving 6 + x = -4.74341649 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 = -4.74341649 + -6 Combine like terms: 6 + -6 = 0 0 + x = -4.74341649 + -6 x = -4.74341649 + -6 Combine like terms: -4.74341649 + -6 = -10.74341649 x = -10.74341649 Simplifying x = -10.74341649

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.25658351, -10.74341649}

See similar equations:

| Y=19x-10 | | 10m-3+10m-3=15m+4 | | 7x+88+3x+12=180 | | 12d=120 | | 3y=56-5y | | 7x-6-3x=x+6+x | | t/14=7 | | g/2=47 | | 8x6/4-12/6 | | 3h=63 | | 7x+23-2x=(-4)-3(-5x+1) | | 6x-9x+6=x-6+12 | | 15e=165 | | -18+x=x+15 | | 7x+88= | | g=d/1-u | | (x-9)(2-x)=0 | | 6(a-6)-7(3a-6)=-3a-6a | | -5+3-(-20)-10= | | (4x+4)+(4x+3)+(4x)=(4x)+(4x)+(5x+5) | | 37x+2=6(6x+8) | | 9x+22+50=180 | | sqrt(3x-1)+6x=107 | | 5c=440 | | m-12=6m+18 | | -2x+3+5x=27 | | 0.75x+11.595=12.141+0.69x | | -17-(-19)+(-4)-16= | | 8ab/6a | | -63z^2-23z+56= | | 5x-70=15y | | -x*-x+160x-6000=0 |

Equations solver categories