-x^2-2x+6=0

Simple and best practice solution for -x^2-2x+6=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^2-2x+6=0 equation:


Simplifying
-1x2 + -2x + 6 = 0

Reorder the terms:
6 + -2x + -1x2 = 0

Solving
6 + -2x + -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'.
-6 + 2x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 2x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 2x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 2x + x2 = 0 + 6
2x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
2x + x2 = 6

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 = 6 + 1

Reorder the terms:
1 + 2x + x2 = 6 + 1

Combine like terms: 6 + 1 = 7
1 + 2x + x2 = 7

Factor a perfect square on the left side:
(x + 1)(x + 1) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + 1) equal to 2.645751311 and -2.645751311.

Subproblem 1

x + 1 = 2.645751311 Simplifying x + 1 = 2.645751311 Reorder the terms: 1 + x = 2.645751311 Solving 1 + x = 2.645751311 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 = 2.645751311 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.645751311 + -1 x = 2.645751311 + -1 Combine like terms: 2.645751311 + -1 = 1.645751311 x = 1.645751311 Simplifying x = 1.645751311

Subproblem 2

x + 1 = -2.645751311 Simplifying x + 1 = -2.645751311 Reorder the terms: 1 + x = -2.645751311 Solving 1 + x = -2.645751311 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 = -2.645751311 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.645751311 + -1 x = -2.645751311 + -1 Combine like terms: -2.645751311 + -1 = -3.645751311 x = -3.645751311 Simplifying x = -3.645751311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.645751311, -3.645751311}

See similar equations:

| 6+7+x=27 | | -.66x=7 | | 3(4x-2)=5x+12+7x | | 325+6x=421 | | -2x-2x=22-6 | | 4-(3x-2)=6 | | 12x=10x+6 | | 23-5d=7d-25 | | 4(3+v)-v=6+3(9v+2) | | -39+19=-2x+6x | | 10x+25=5 | | 6-(-p+8)=-6p+12 | | 9g+17=8g+28 | | X-16=-22 | | 3(u+2)+2u=7(u-1)+9 | | 5h+4=h+16 | | 1x=6.6 | | 0.5t+0.25(t+16)=4+0.75 | | 6x-2=2x-8 | | f-15=6 | | 13r+11=15r-3 | | 2r+6=3-2r | | 9x-2=x+14 | | (z-3)(z+3)= | | 4(3x+4)=11(x+5) | | 57y=8(7y-4) | | 2b+3b-3b-b= | | 5z=1.3+6.2 | | 70x+20=20x-5 | | 140=-7(-8+2a) | | 13=9x-6 | | 6y-3+3(3y+5)=-3(y+1) |

Equations solver categories