-x^2-12x+27=0

Simple and best practice solution for -x^2-12x+27=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+27=0 equation:


Simplifying
-1x2 + -12x + 27 = 0

Reorder the terms:
27 + -12x + -1x2 = 0

Solving
27 + -12x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-27 + 12x + x2 = 0

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + 12x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + 12x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + 12x + x2 = 0 + 27
12x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
12x + x2 = 27

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 = 27 + 36

Reorder the terms:
36 + 12x + x2 = 27 + 36

Combine like terms: 27 + 36 = 63
36 + 12x + x2 = 63

Factor a perfect square on the left side:
(x + 6)(x + 6) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(x + 6) equal to 7.937253933 and -7.937253933.

Subproblem 1

x + 6 = 7.937253933 Simplifying x + 6 = 7.937253933 Reorder the terms: 6 + x = 7.937253933 Solving 6 + x = 7.937253933 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 = 7.937253933 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.937253933 + -6 x = 7.937253933 + -6 Combine like terms: 7.937253933 + -6 = 1.937253933 x = 1.937253933 Simplifying x = 1.937253933

Subproblem 2

x + 6 = -7.937253933 Simplifying x + 6 = -7.937253933 Reorder the terms: 6 + x = -7.937253933 Solving 6 + x = -7.937253933 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 = -7.937253933 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.937253933 + -6 x = -7.937253933 + -6 Combine like terms: -7.937253933 + -6 = -13.937253933 x = -13.937253933 Simplifying x = -13.937253933

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.937253933, -13.937253933}

See similar equations:

| -x-12x+27=0 | | x^3+x^2+16x=-16 | | y=2000x(0.5) | | x=2z-m/b | | x^2/18 | | y-120=600 | | -37+y=9.5 | | -7(w-8)=8w+26 | | 5x+0.050=-0.732 | | 2(w+5)-7w=30 | | x(x)+x(x)= | | 19=-9v-5+6v | | 9x^3+45x^2=0 | | -5+=3 | | 1/2(x+3)+1/3(2x+1)=4 | | 3x+14y=12 | | 3m^2+1=4m | | y=300/x | | 7x+1/-8=x-3/4 | | c^2-36=-5c | | 3x-2(-x-7)=-1 | | 6x^2y-3xy^2= | | 3r^2-10r-8= | | -5+w=3 | | x-8.42=-30 | | y=30+20(8) | | 2x^2+4=5x | | t^5-81t=0 | | -8=v+3 | | 0.7(6-0.3n)=21 | | 5+v=4 | | 6k+3(k+2)=5k+12k |

Equations solver categories