2-9X=3X^2

Simple and best practice solution for 2-9X=3X^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 2-9X=3X^2 equation:


Simplifying
2 + -9X = 3X2

Solving
2 + -9X = 3X2

Solving for variable 'X'.

Combine like terms: 3X2 + -3X2 = 0
2 + -9X + -3X2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-0.6666666667 + 3X + X2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 3X + 0.6666666667 + X2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 3X + X2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 3X + X2 = 0 + 0.6666666667
3X + X2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
3X + X2 = 0.6666666667

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 = 0.6666666667 + 2.25

Reorder the terms:
2.25 + 3X + X2 = 0.6666666667 + 2.25

Combine like terms: 0.6666666667 + 2.25 = 2.9166666667
2.25 + 3X + X2 = 2.9166666667

Factor a perfect square on the left side:
(X + 1.5)(X + 1.5) = 2.9166666667

Calculate the square root of the right side: 1.707825128

Break this problem into two subproblems by setting 
(X + 1.5) equal to 1.707825128 and -1.707825128.

Subproblem 1

X + 1.5 = 1.707825128 Simplifying X + 1.5 = 1.707825128 Reorder the terms: 1.5 + X = 1.707825128 Solving 1.5 + X = 1.707825128 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 = 1.707825128 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + X = 1.707825128 + -1.5 X = 1.707825128 + -1.5 Combine like terms: 1.707825128 + -1.5 = 0.207825128 X = 0.207825128 Simplifying X = 0.207825128

Subproblem 2

X + 1.5 = -1.707825128 Simplifying X + 1.5 = -1.707825128 Reorder the terms: 1.5 + X = -1.707825128 Solving 1.5 + X = -1.707825128 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 = -1.707825128 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + X = -1.707825128 + -1.5 X = -1.707825128 + -1.5 Combine like terms: -1.707825128 + -1.5 = -3.207825128 X = -3.207825128 Simplifying X = -3.207825128

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.207825128, -3.207825128}

See similar equations:

| 8y+16=-16 | | 8b-5b=30 | | 700+1200x=1,000,000 | | 10n^2-41n+40=0 | | (3x-2)+(-3x+2)= | | a^2+10a+28=7 | | vx+51=100 | | 24x^2+124x-120=0 | | 8/9*4/9 | | 3n+6-8n=34-11n+20 | | -x+48=9+19x | | 4(x+2y+5)= | | 25x^2+185x+210=0 | | 3e+19=-11 | | -3(3m-6)= | | -3x/3-x+15/x+9=1 | | -2[x+(-5)]=14 | | X+19=-3 | | 15y^2+7y=2 | | 102X+130X-72+40=240 | | -25p-2=14 | | 7p-2q=55 | | 9x-4=3x-3 | | x^2+4x-180=0 | | 5(4.9-2/3y) | | 4x^4+5=0 | | =2sin(2x) | | 5x-2(5x+6)=2 | | 6=-15.9t^2+110.5t+3.02 | | (9x^2+10x+4)-(9x^2+5x-1)= | | x^24-4x-5=0 | | -8(y-4)= |

Equations solver categories