2x=x^2-16

Simple and best practice solution for 2x=x^2-16 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 2x=x^2-16 equation:


Simplifying
2x = x2 + -16

Reorder the terms:
2x = -16 + x2

Solving
2x = -16 + x2

Solving for variable 'x'.

Reorder the terms:
16 + 2x + -1x2 = -16 + x2 + 16 + -1x2

Reorder the terms:
16 + 2x + -1x2 = -16 + 16 + x2 + -1x2

Combine like terms: -16 + 16 = 0
16 + 2x + -1x2 = 0 + x2 + -1x2
16 + 2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
16 + 2x + -1x2 = 0

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

Divide each side by '-1'.
-16 + -2x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -2x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -2x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -2x + x2 = 0 + 16
-2x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-2x + x2 = 16

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 16 + 1

Reorder the terms:
1 + -2x + x2 = 16 + 1

Combine like terms: 16 + 1 = 17
1 + -2x + x2 = 17

Factor a perfect square on the left side:
(x + -1)(x + -1) = 17

Calculate the square root of the right side: 4.123105626

Break this problem into two subproblems by setting 
(x + -1) equal to 4.123105626 and -4.123105626.

Subproblem 1

x + -1 = 4.123105626 Simplifying x + -1 = 4.123105626 Reorder the terms: -1 + x = 4.123105626 Solving -1 + x = 4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 4.123105626 + 1 Combine like terms: -1 + 1 = 0 0 + x = 4.123105626 + 1 x = 4.123105626 + 1 Combine like terms: 4.123105626 + 1 = 5.123105626 x = 5.123105626 Simplifying x = 5.123105626

Subproblem 2

x + -1 = -4.123105626 Simplifying x + -1 = -4.123105626 Reorder the terms: -1 + x = -4.123105626 Solving -1 + x = -4.123105626 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -4.123105626 + 1 Combine like terms: -1 + 1 = 0 0 + x = -4.123105626 + 1 x = -4.123105626 + 1 Combine like terms: -4.123105626 + 1 = -3.123105626 x = -3.123105626 Simplifying x = -3.123105626

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.123105626, -3.123105626}

See similar equations:

| 2y=48-4y | | 48x-16x^2=20 | | 10x+6=12x-7 | | -x^2+.5x-2=0 | | 1/18x216= | | X^2+.5-2=0 | | 20=4e^2x | | X-2(-4.4)=11 | | 3ln(5x-1)+4=7 | | 5(11+2y)=11 | | 16x/72= | | 5/1=.15/x | | (n-4)(n-5)(n-6)(n-7)(n-8)(n-8)(n-9)(n-10)=1663200 | | 3(x-3)-(6x+3)=6(3x+3) | | 5(x-5)-(2x+1)-3(3x+3)= | | 12-3x-6+4=28 | | 24x-12/6 | | (5x^2)-4x=0.1 | | 4(x-6)-(4x+4)-2(2x+6)= | | -1.4(x-5)-1.6(x-4.4)=10.14 | | 28=(w)(2w+1) | | 0.1=x(5x-4) | | 10x-20=-4x+24 | | 8a+3ya=0 | | 4t-5=(t+5) | | 8/x=5/x-3 | | Log(1/4)^64 | | Tan27=x/8 | | (x+2)(x+2)=72 | | 10n^2-43n+28=0 | | (3x+20)y*10-5=0 | | Y+34=6 |

Equations solver categories