-x^2+12x+3=0

Simple and best practice solution for -x^2+12x+3=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+3=0 equation:


Simplifying
-1x2 + 12x + 3 = 0

Reorder the terms:
3 + 12x + -1x2 = 0

Solving
3 + 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'.
-3 + -12x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -12x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -12x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -12x + x2 = 0 + 3
-12x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-12x + x2 = 3

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 = 3 + 36

Reorder the terms:
36 + -12x + x2 = 3 + 36

Combine like terms: 3 + 36 = 39
36 + -12x + x2 = 39

Factor a perfect square on the left side:
(x + -6)(x + -6) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(x + -6) equal to 6.244997998 and -6.244997998.

Subproblem 1

x + -6 = 6.244997998 Simplifying x + -6 = 6.244997998 Reorder the terms: -6 + x = 6.244997998 Solving -6 + x = 6.244997998 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 = 6.244997998 + 6 Combine like terms: -6 + 6 = 0 0 + x = 6.244997998 + 6 x = 6.244997998 + 6 Combine like terms: 6.244997998 + 6 = 12.244997998 x = 12.244997998 Simplifying x = 12.244997998

Subproblem 2

x + -6 = -6.244997998 Simplifying x + -6 = -6.244997998 Reorder the terms: -6 + x = -6.244997998 Solving -6 + x = -6.244997998 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 = -6.244997998 + 6 Combine like terms: -6 + 6 = 0 0 + x = -6.244997998 + 6 x = -6.244997998 + 6 Combine like terms: -6.244997998 + 6 = -0.244997998 x = -0.244997998 Simplifying x = -0.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.244997998, -0.244997998}

See similar equations:

| x-5y=5 | | 4X+2Y=72 | | 15x+25=18x-10 | | x+-15=5 | | 3(2x-5)=4x-17 | | (x+1)=2(x-1) | | 8x^2+2x-6=0 | | 30-2(x+4)=42 | | 15y+14=(5y+6) | | 2X^2=8x+3 | | 1x^2+x-30=0 | | 9-9x=147-44x | | 16w=32 | | x-2(x-2+x+2)=x^2 | | 6b^2-17b+12=0 | | 72-2x=2x+20 | | 3x+27-x=15 | | y-4=0.75y | | 2x-15=15-2x | | w^2=24-2w | | 0=t^2(5t^2+3) | | (3x^2-2)=(6x-2) | | 4.5z=72 | | 9x-(3x-13)=43 | | 2x+9=4x-1 | | (5v+4)(2+v)=0 | | 3x^2+29-10=0 | | 8x+35=7x+3 | | -3(t-2)+7t=9t-2 | | 2x+7+3x=47 | | 0=4x^2 | | 6u+18=6 |

Equations solver categories