0=x^2+12x-54

Simple and best practice solution for 0=x^2+12x-54 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 0=x^2+12x-54 equation:


Simplifying
0 = x2 + 12x + -54

Reorder the terms:
0 = -54 + 12x + x2

Solving
0 = -54 + 12x + x2

Solving for variable 'x'.

Combine like terms: 0 + 54 = 54
54 + -12x + -1x2 = -54 + 12x + x2 + 54 + -12x + -1x2

Reorder the terms:
54 + -12x + -1x2 = -54 + 54 + 12x + -12x + x2 + -1x2

Combine like terms: -54 + 54 = 0
54 + -12x + -1x2 = 0 + 12x + -12x + x2 + -1x2
54 + -12x + -1x2 = 12x + -12x + x2 + -1x2

Combine like terms: 12x + -12x = 0
54 + -12x + -1x2 = 0 + x2 + -1x2
54 + -12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
54 + -12x + -1x2 = 0

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

Divide each side by '-1'.
-54 + 12x + x2 = 0

Move the constant term to the right:

Add '54' to each side of the equation.
-54 + 12x + 54 + x2 = 0 + 54

Reorder the terms:
-54 + 54 + 12x + x2 = 0 + 54

Combine like terms: -54 + 54 = 0
0 + 12x + x2 = 0 + 54
12x + x2 = 0 + 54

Combine like terms: 0 + 54 = 54
12x + x2 = 54

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 = 54 + 36

Reorder the terms:
36 + 12x + x2 = 54 + 36

Combine like terms: 54 + 36 = 90
36 + 12x + x2 = 90

Factor a perfect square on the left side:
(x + 6)(x + 6) = 90

Calculate the square root of the right side: 9.486832981

Break this problem into two subproblems by setting 
(x + 6) equal to 9.486832981 and -9.486832981.

Subproblem 1

x + 6 = 9.486832981 Simplifying x + 6 = 9.486832981 Reorder the terms: 6 + x = 9.486832981 Solving 6 + x = 9.486832981 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 = 9.486832981 + -6 Combine like terms: 6 + -6 = 0 0 + x = 9.486832981 + -6 x = 9.486832981 + -6 Combine like terms: 9.486832981 + -6 = 3.486832981 x = 3.486832981 Simplifying x = 3.486832981

Subproblem 2

x + 6 = -9.486832981 Simplifying x + 6 = -9.486832981 Reorder the terms: 6 + x = -9.486832981 Solving 6 + x = -9.486832981 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 = -9.486832981 + -6 Combine like terms: 6 + -6 = 0 0 + x = -9.486832981 + -6 x = -9.486832981 + -6 Combine like terms: -9.486832981 + -6 = -15.486832981 x = -15.486832981 Simplifying x = -15.486832981

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.486832981, -15.486832981}

See similar equations:

| (y-4)(y-2)= | | 4y-7+y+21=6y+20-3y | | x/10+12=-15 | | -16a=6a-4 | | 4+8a-17+3a=7a+1+5a-10 | | 24x^2-96x+72=0 | | 5x-x=2(33+30) | | ((x^2)/(x^2))^4 | | T^2=100/169 | | x/7-12=-2 | | -5(w-5)=-7w+9 | | 59.8=x/(0.2-x)^2 | | (x^2/x^2)^2 | | 5x-x=(2)33+30 | | x^2+66x-1=0 | | b/7-4=5 | | .4x-3=1.5(4x-3) | | 9+4/5=6 | | -8+4y=-36 | | x^2+5=-13 | | 7x-14=3x+6 | | 11-16z=75 | | 7n+3n=120 | | 3X+15=3Y-15 | | 11=15z+16 | | 2(x+7)-4=-20-4x | | v(8v-5)=0 | | 3y+15=3x-15 | | .429x-1=.667(6x-2) | | 5/6=9/2-2x/3 | | 0=w^2+8w-90 | | 2/5x+6=2/3x+10 |

Equations solver categories