3x-2x(x+1)=-2

Simple and best practice solution for 3x-2x(x+1)=-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 3x-2x(x+1)=-2 equation:


Simplifying
3x + -2x(x + 1) = -2

Reorder the terms:
3x + -2x(1 + x) = -2
3x + (1 * -2x + x * -2x) = -2
3x + (-2x + -2x2) = -2

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

Solving
1x + -2x2 = -2

Solving for variable 'x'.

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

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

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

Divide each side by '-2'.
-1 + -0.5x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.5x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.5x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.5x + x2 = 0 + 1
-0.5x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.5x + x2 = 1

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 1 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 1 + 0.0625

Combine like terms: 1 + 0.0625 = 1.0625
0.0625 + -0.5x + x2 = 1.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 1.0625

Calculate the square root of the right side: 1.030776406

Break this problem into two subproblems by setting 
(x + -0.25) equal to 1.030776406 and -1.030776406.

Subproblem 1

x + -0.25 = 1.030776406 Simplifying x + -0.25 = 1.030776406 Reorder the terms: -0.25 + x = 1.030776406 Solving -0.25 + x = 1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 1.030776406 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 1.030776406 + 0.25 x = 1.030776406 + 0.25 Combine like terms: 1.030776406 + 0.25 = 1.280776406 x = 1.280776406 Simplifying x = 1.280776406

Subproblem 2

x + -0.25 = -1.030776406 Simplifying x + -0.25 = -1.030776406 Reorder the terms: -0.25 + x = -1.030776406 Solving -0.25 + x = -1.030776406 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -1.030776406 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -1.030776406 + 0.25 x = -1.030776406 + 0.25 Combine like terms: -1.030776406 + 0.25 = -0.780776406 x = -0.780776406 Simplifying x = -0.780776406

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.280776406, -0.780776406}

See similar equations:

| 9-6y=27 | | 3(k+4)=3k+12 | | (14/3)*(8/14) | | 4(x+10)=24x | | 4+x-9=-6+11 | | 6=b-11 | | 10-20u=-17u-14 | | 5x-2=77 | | 3(x+3)=6(2x-9) | | 3x-2x(x-1)=-2 | | 3x+3y+3z=0 | | 4(r+20)=5(20+400) | | -10q+14q-3=-19 | | 12+5c=52 | | v=559100t+6423000 | | 7x=4(3x+1) | | 5x-3=11x+12x | | -3(y-5y)+4=-2(4y-y)+3+17y | | 4(2.25x+3.25)=2(4.25x+4.5) | | 3.6+1.2=4.8x | | x+2(40)=103 | | -12=-4(p+17)+-20 | | 4(2x-8)=7x+10 | | 6r-28=44 | | 5x+27=7x | | 2.3=y-0.67 | | 9-5y=24 | | 5-3(6n+1)=-142 | | 2(2x+11)+(x-2)=180 | | -1-3n=-10n-1 | | 21y-20y+20=-20 | | 1.2+x=3.6 |

Equations solver categories