12+8x-x^2=0

Simple and best practice solution for 12+8x-x^2=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 12+8x-x^2=0 equation:


Simplifying
12 + 8x + -1x2 = 0

Solving
12 + 8x + -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'.
-12 + -8x + x2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -8x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + -8x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -8x + x2 = 0 + 12
-8x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
-8x + x2 = 12

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 12 + 16

Reorder the terms:
16 + -8x + x2 = 12 + 16

Combine like terms: 12 + 16 = 28
16 + -8x + x2 = 28

Factor a perfect square on the left side:
(x + -4)(x + -4) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(x + -4) equal to 5.291502622 and -5.291502622.

Subproblem 1

x + -4 = 5.291502622 Simplifying x + -4 = 5.291502622 Reorder the terms: -4 + x = 5.291502622 Solving -4 + x = 5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 5.291502622 + 4 Combine like terms: -4 + 4 = 0 0 + x = 5.291502622 + 4 x = 5.291502622 + 4 Combine like terms: 5.291502622 + 4 = 9.291502622 x = 9.291502622 Simplifying x = 9.291502622

Subproblem 2

x + -4 = -5.291502622 Simplifying x + -4 = -5.291502622 Reorder the terms: -4 + x = -5.291502622 Solving -4 + x = -5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -5.291502622 + 4 Combine like terms: -4 + 4 = 0 0 + x = -5.291502622 + 4 x = -5.291502622 + 4 Combine like terms: -5.291502622 + 4 = -1.291502622 x = -1.291502622 Simplifying x = -1.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.291502622, -1.291502622}

See similar equations:

| x+3+5=38 | | 3x-20+68=180 | | 5x+8-12x=-6x-3 | | x^2=2(x+112) | | 3.5b-3.34=75.1 | | 4s=3s-14 | | 7(4-2x)-6x=-32 | | 15x^3+26x^2+8x=0 | | p(5p-8)=0 | | 6p+1=3(2p-5) | | 7(4-2x)-6x= | | -(16c-53d+14)= | | 8u+2(u-10)=10 | | 7y+2(y-8)=4(y+2)-3 | | X+10+3x=170 | | -(3x-7)= | | 33+19x+2x^2=0 | | 6b+7x=12b-5 | | w^2+12w+22=0 | | 3(x-1)+9=8x+6-5x | | 2x-3=(2x+3)+9 | | 8x+1=7x+54 | | x+(x+3+5)=38 | | w^2=-27-12w | | -20xy+25x^2+4y^2=0 | | (2x+5)+(x+9)= | | 2x-3=2x+3+9 | | x+3x+5x=38 | | 3a+2x=4 | | 6-5(3x-4)=-4 | | y^2-6y=16x+71 | | 2(6-7k)=2k-4 |

Equations solver categories