x-2(x-1+x-2)=x^2

Simple and best practice solution for x-2(x-1+x-2)=x^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 x-2(x-1+x-2)=x^2 equation:


Simplifying
x + -2(x + -1 + x + -2) = x2

Reorder the terms:
x + -2(-1 + -2 + x + x) = x2

Combine like terms: -1 + -2 = -3
x + -2(-3 + x + x) = x2

Combine like terms: x + x = 2x
x + -2(-3 + 2x) = x2
x + (-3 * -2 + 2x * -2) = x2
x + (6 + -4x) = x2

Reorder the terms:
6 + x + -4x = x2

Combine like terms: x + -4x = -3x
6 + -3x = x2

Solving
6 + -3x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
6 + -3x + -1x2 = 0

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

Divide each side by '-1'.
-6 + 3x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 3x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 3x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 3x + x2 = 0 + 6
3x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
3x + x2 = 6

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 6 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 6 + 2.25

Combine like terms: 6 + 2.25 = 8.25
2.25 + 3x + x2 = 8.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(x + 1.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

x + 1.5 = 2.872281323 Simplifying x + 1.5 = 2.872281323 Reorder the terms: 1.5 + x = 2.872281323 Solving 1.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 2.872281323 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.872281323 + -1.5 x = 2.872281323 + -1.5 Combine like terms: 2.872281323 + -1.5 = 1.372281323 x = 1.372281323 Simplifying x = 1.372281323

Subproblem 2

x + 1.5 = -2.872281323 Simplifying x + 1.5 = -2.872281323 Reorder the terms: 1.5 + x = -2.872281323 Solving 1.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -2.872281323 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.872281323 + -1.5 x = -2.872281323 + -1.5 Combine like terms: -2.872281323 + -1.5 = -4.372281323 x = -4.372281323 Simplifying x = -4.372281323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.372281323, -4.372281323}

See similar equations:

| 7.2*7.2= | | 3X^2+24x=-45 | | 12t+(7-3t)=-8t-30 | | y=9/8x+5 | | =m^2-9m-18 | | (3x-2)(x+4)= | | (Y-7)2= | | 1/(6x^2+9x) | | 0=m^2-9m-18 | | 3.14*8= | | 0=9x^2+29x+22 | | 3.14*36= | | x^2-2(x-2)=x^2 | | 2j+9=13 | | 4+2x=23-5x | | -4+7x=-5x-40 | | (2/(x+5))-(2/(x^2+5x))=1/x | | (6n+7)(3n+1)= | | 8e^3x-8=30 | | (M+4)3= | | 4(t-5)=5-t | | 0=9x^2+37x+22 | | 0=9x^2+37x+22 | | 4(t-50)=5-t | | -6x+4=4+2x | | -55=x-3y | | 7/(x-8)=(1/(x-8))+1 | | -2(3+4m)-9=45 | | 14x+9y=180 | | y=-4x^2+8x+8 | | 6/8-13/14 | | 0=-3y-18 |

Equations solver categories