2g^2-g-9=0

Simple and best practice solution for 2g^2-g-9=0 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 2g^2-g-9=0 equation:


Simplifying
2g2 + -1g + -9 = 0

Reorder the terms:
-9 + -1g + 2g2 = 0

Solving
-9 + -1g + 2g2 = 0

Solving for variable 'g'.

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

Divide each side by '2'.
-4.5 + -0.5g + g2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + -0.5g + 4.5 + g2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + -0.5g + g2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + -0.5g + g2 = 0 + 4.5
-0.5g + g2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
-0.5g + g2 = 4.5

The g term is -0.5g.  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.
-0.5g + 0.0625 + g2 = 4.5 + 0.0625

Reorder the terms:
0.0625 + -0.5g + g2 = 4.5 + 0.0625

Combine like terms: 4.5 + 0.0625 = 4.5625
0.0625 + -0.5g + g2 = 4.5625

Factor a perfect square on the left side:
(g + -0.25)(g + -0.25) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(g + -0.25) equal to 2.136000936 and -2.136000936.

Subproblem 1

g + -0.25 = 2.136000936 Simplifying g + -0.25 = 2.136000936 Reorder the terms: -0.25 + g = 2.136000936 Solving -0.25 + g = 2.136000936 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + g = 2.136000936 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + g = 2.136000936 + 0.25 g = 2.136000936 + 0.25 Combine like terms: 2.136000936 + 0.25 = 2.386000936 g = 2.386000936 Simplifying g = 2.386000936

Subproblem 2

g + -0.25 = -2.136000936 Simplifying g + -0.25 = -2.136000936 Reorder the terms: -0.25 + g = -2.136000936 Solving -0.25 + g = -2.136000936 Solving for variable 'g'. Move all terms containing g to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + g = -2.136000936 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + g = -2.136000936 + 0.25 g = -2.136000936 + 0.25 Combine like terms: -2.136000936 + 0.25 = -1.886000936 g = -1.886000936 Simplifying g = -1.886000936

Solution

The solution to the problem is based on the solutions from the subproblems. g = {2.386000936, -1.886000936}

See similar equations:

| 3x^4-12x^3-15x^2=0 | | 5n^2+n-3=0 | | -5=4x-20 | | 200y=150x+12 | | 3x^4/ | | 6(6)/2-12/2 | | 34-8=35 | | X^2+3y^2=13 | | {1/4}-1 | | -7c+3=c+379 | | 3x+24=1x+4 | | 20=6(q+10)-2q | | -6y^2+9y-3=0 | | 5x+0=7 | | s+64=-4s+9 | | A-64=26 | | 7y^2+9y+1=0 | | 6x-3(x-2)=5x-4 | | -(4m+10)=54 | | 7y^2+9y= | | 2(x+3)-1=5x+1 | | 8a+50=-2a | | S=p/5 | | 64-b=26 | | 3(x+1.28)+x=2x | | 9=7q^2 | | e-2=-e-6 | | 14/17=x/34 | | x^4+x^3-16x^2+2x+4=0 | | -87=x+x | | 2x+2y+z=13 | | -7+(-1)+(2)= |

Equations solver categories