x^2-2x=16

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


Simplifying
x2 + -2x = 16

Reorder the terms:
-2x + x2 = 16

Solving
-2x + x2 = 16

Solving for variable 'x'.

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

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

Begin completing the square.

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:

| 5x+9=2x+48 | | 12=3(y-6)+3y | | -5q=-3q+10 | | 52x^2+13=0 | | 2x-4+x=28 | | 24=-8u+5(u+6) | | 2x^2+2y^2-2xy-2x+4y+5=0 | | 3x^2+27x-6.5=0 | | 8(x-3)+9=5x+3(-4+x) | | 15-27=2(21) | | 5w=6w+7 | | .65x+18.50=.75x+18.50 | | 5s+8t=70 | | 6x^3-x^2-27x-20=0 | | (-81)/(+9)= | | n^2+3n-12-6=0 | | 2x^2-5x^2+5x-2=0 | | 0.01x+3.97=2.04x-2.12 | | -2x+4-2x=12 | | -2b+7=11 | | n^2+7n+15-5=0 | | (3u^2)-u-10=0 | | 200-25p=0 | | x(1.8+x)=.19 | | -5(x+1)+14=-3x+1 | | 3iz-z(1+i)-4i=0 | | 9x-16-3x=26 | | y^2-5y-x+9=0 | | t^2=5r | | 5x-2x+x= | | 4(2x-3)=3+8-11 | | 4a+5(-2a-3)-a=-1 |

Equations solver categories