2x^2=x+2

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


Simplifying
2x2 = x + 2

Reorder the terms:
2x2 = 2 + x

Solving
2x2 = 2 + x

Solving for variable 'x'.

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

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

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

Combine like terms: x + -1x = 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:

| -5+0.2*a=6 | | X^3-2X-5=0 | | 0.2x=-7 | | 4m^2-9m+56=0 | | 16x^4-81= | | 25x^2+5x+12=0 | | 3(6-9m)=-9(3m-2) | | 2y+y= | | =-2x-4 | | (x^3-5xy-9y^2)-(8x^3+10xy+12y^2)= | | x-7y=5 | | 6x^4-42x^3+18x^2= | | (x+2)(20+-2x)=5x | | 5x^2=46 | | d+5d+3d= | | y^2-8x-6y+1=0 | | 5x^2-9=46 | | 4x+3.8=2x+2.8 | | x/7-5=6 | | 5x-4x+3x+8=8 | | 3x-3.6=x-5 | | 4(x+8)-3x+7(2x-1)=34 | | 5x-4x+3x=8-8 | | y=-x-6 | | 15y=1+10x | | 6-8m=-3m+26 | | 10x+8=11x+12 | | x/3-11=x-233 | | 3n-9=0 | | (x+2)(20+-2x)=40 | | 4y-9(9y+82)=32 | | 6(2t-3t)= |

Equations solver categories