-1=2x^2-4x-2

Simple and best practice solution for -1=2x^2-4x-2 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 -1=2x^2-4x-2 equation:


Simplifying
-1 = 2x2 + -4x + -2

Reorder the terms:
-1 = -2 + -4x + 2x2

Solving
-1 = -2 + -4x + 2x2

Solving for variable 'x'.

Combine like terms: -1 + 2 = 1
1 + 4x + -2x2 = -2 + -4x + 2x2 + 2 + 4x + -2x2

Reorder the terms:
1 + 4x + -2x2 = -2 + 2 + -4x + 4x + 2x2 + -2x2

Combine like terms: -2 + 2 = 0
1 + 4x + -2x2 = 0 + -4x + 4x + 2x2 + -2x2
1 + 4x + -2x2 = -4x + 4x + 2x2 + -2x2

Combine like terms: -4x + 4x = 0
1 + 4x + -2x2 = 0 + 2x2 + -2x2
1 + 4x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
1 + 4x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-0.5 + -2x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -2x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -2x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -2x + x2 = 0 + 0.5
-2x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-2x + x2 = 0.5

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 = 0.5 + 1

Reorder the terms:
1 + -2x + x2 = 0.5 + 1

Combine like terms: 0.5 + 1 = 1.5
1 + -2x + x2 = 1.5

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(x + -1) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + -1 = 1.224744871 Simplifying x + -1 = 1.224744871 Reorder the terms: -1 + x = 1.224744871 Solving -1 + x = 1.224744871 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 = 1.224744871 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.224744871 + 1 x = 1.224744871 + 1 Combine like terms: 1.224744871 + 1 = 2.224744871 x = 2.224744871 Simplifying x = 2.224744871

Subproblem 2

x + -1 = -1.224744871 Simplifying x + -1 = -1.224744871 Reorder the terms: -1 + x = -1.224744871 Solving -1 + x = -1.224744871 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 = -1.224744871 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.224744871 + 1 x = -1.224744871 + 1 Combine like terms: -1.224744871 + 1 = -0.224744871 x = -0.224744871 Simplifying x = -0.224744871

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.224744871, -0.224744871}

See similar equations:

| x^2-9x+23=9(x-6) | | 0.5(3x-1)=2x-1 | | x+47=777899521367 | | 2x+x+3x-18=180 | | 12-32+52= | | x+5-4x=6x-11 | | -6x+5=24 | | 12t^3-48t= | | 5+6X-1=10 | | 5x+1/2=2x+3 | | 3(30-s)=4(s+19) | | 4X^2-64= | | 5x+150=8x+204 | | 225H^2-1= | | n/10+7=9 | | 15x^2-45x= | | 2m^2-8= | | -2/7x=12.4 | | -(6/7)x=-43.5 | | 3x+46=5x+32 | | x=45/(9*4) | | x=45/4-9 | | x=(45+9)/4 | | (4k-1)x-4x^2-k^2=0 | | x=45/9-4 | | x=(45-9)/4 | | 5x^2+24x=5 | | -7.3x=73.0 | | -155,000.00+12,000.00x=3 | | 3c/4-c/4=c/4+2 | | b^2=20 | | (x^2)/2+6x-32=0 |

Equations solver categories