2x^2=-x+12

Simple and best practice solution for 2x^2=-x+12 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+12 equation:


Simplifying
2x2 = -1x + 12

Reorder the terms:
2x2 = 12 + -1x

Solving
2x2 = 12 + -1x

Solving for variable 'x'.

Reorder the terms:
-12 + x + 2x2 = 12 + -1x + -12 + x

Reorder the terms:
-12 + x + 2x2 = 12 + -12 + -1x + x

Combine like terms: 12 + -12 = 0
-12 + x + 2x2 = 0 + -1x + x
-12 + x + 2x2 = -1x + x

Combine like terms: -1x + x = 0
-12 + x + 2x2 = 0

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

Divide each side by '2'.
-6 + 0.5x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 0.5x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 0.5x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 0.5x + x2 = 0 + 6
0.5x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
0.5x + x2 = 6

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

Add '0.25' to each side of the equation.
0.5x + 0.25 + x2 = 6 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = 6 + 0.25

Combine like terms: 6 + 0.25 = 6.25
0.25 + 0.5x + x2 = 6.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 6.25

Calculate the square root of the right side: 2.5

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.5 and -2.5.

Subproblem 1

x + 0.5 = 2.5 Simplifying x + 0.5 = 2.5 Reorder the terms: 0.5 + x = 2.5 Solving 0.5 + x = 2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 2.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.5 + -0.5 x = 2.5 + -0.5 Combine like terms: 2.5 + -0.5 = 2 x = 2 Simplifying x = 2

Subproblem 2

x + 0.5 = -2.5 Simplifying x + 0.5 = -2.5 Reorder the terms: 0.5 + x = -2.5 Solving 0.5 + x = -2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -2.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.5 + -0.5 x = -2.5 + -0.5 Combine like terms: -2.5 + -0.5 = -3 x = -3 Simplifying x = -3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2, -3}

See similar equations:

| 17x+55y=4 | | a(a-x)+3a(x+2a)-a(x-3a)= | | a=2nw | | 4(-3)+15= | | (x^2-4x-12)/(x^2-2x-24)=0 | | e=np | | 3+2[4x-3(5-x)]=3(x-20) | | m+3n=p | | -4X^2=-X+8 | | .1(x+50)+1.3x=54 | | 5/3y=45 | | -6(x-12)+2(x+2)=x+3 | | 1=15(2)+10 | | 0.6x-10+0.7=1.4x-4+2(0.35) | | 1/3z-612 | | [2t+3]+2=5 | | z^2+(3+4i)*z-1+5i=0 | | 9x+xsqaured=0 | | (200-30)*x=200*x-30*5 | | 3x+(3x+4)=72 | | 8=18(15)-1 | | (5x+35)=(6x-30) | | 2x^7=10 | | 16x+8y+z=400 | | 2a+12=40 | | 4x^2+21v+5= | | 32*2=10d | | 21-7x+x=22+2x | | 5(3-7x)=-x-48 | | -4(4x+4)-5x-5=1 | | -4(4x+4)-5x-5= | | 14x+13=105 |

Equations solver categories