9b^2-12b=4

Simple and best practice solution for 9b^2-12b=4 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 9b^2-12b=4 equation:


Simplifying
9b2 + -12b = 4

Reorder the terms:
-12b + 9b2 = 4

Solving
-12b + 9b2 = 4

Solving for variable 'b'.

Reorder the terms:
-4 + -12b + 9b2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -12b + 9b2 = 0

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

Divide each side by '9'.
-0.4444444444 + -1.333333333b + b2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -1.333333333b + 0.4444444444 + b2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -1.333333333b + b2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -1.333333333b + b2 = 0 + 0.4444444444
-1.333333333b + b2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-1.333333333b + b2 = 0.4444444444

The b term is -1.333333333b.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333b + 0.4444444442 + b2 = 0.4444444444 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333b + b2 = 0.4444444444 + 0.4444444442

Combine like terms: 0.4444444444 + 0.4444444442 = 0.8888888886
0.4444444442 + -1.333333333b + b2 = 0.8888888886

Factor a perfect square on the left side:
(b + -0.6666666665)(b + -0.6666666665) = 0.8888888886

Calculate the square root of the right side: 0.942809041

Break this problem into two subproblems by setting 
(b + -0.6666666665) equal to 0.942809041 and -0.942809041.

Subproblem 1

b + -0.6666666665 = 0.942809041 Simplifying b + -0.6666666665 = 0.942809041 Reorder the terms: -0.6666666665 + b = 0.942809041 Solving -0.6666666665 + b = 0.942809041 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + b = 0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + b = 0.942809041 + 0.6666666665 b = 0.942809041 + 0.6666666665 Combine like terms: 0.942809041 + 0.6666666665 = 1.6094757075 b = 1.6094757075 Simplifying b = 1.6094757075

Subproblem 2

b + -0.6666666665 = -0.942809041 Simplifying b + -0.6666666665 = -0.942809041 Reorder the terms: -0.6666666665 + b = -0.942809041 Solving -0.6666666665 + b = -0.942809041 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + b = -0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + b = -0.942809041 + 0.6666666665 b = -0.942809041 + 0.6666666665 Combine like terms: -0.942809041 + 0.6666666665 = -0.2761423745 b = -0.2761423745 Simplifying b = -0.2761423745

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.6094757075, -0.2761423745}

See similar equations:

| 18-8m=3m-2m | | Log[2](30x)-log[2](5)=log[2](12) | | 5-5x=7-2x | | -6x+1+7x=-17+8 | | 5m=-45.2+3.5m | | 9v^2-13v+4= | | 2625=x^3 | | 2(-3)-5=5(-3+2) | | 3n^2+4n-95=0 | | 4n-8=-20 | | 2625=r^3 | | 3x-5y-x-5y= | | .11x^2-9x+350=0 | | 5+5x=7+2x | | 16x+33=17+39 | | -8(n+3)+26=-4n-22 | | (5x-5)(4x+2)= | | 9x+5(2x+11)=3(x+21)+2(8x-4) | | 4x-y=84 | | -27=8*-5x | | 9x+5(2x+11)=3(x+21) | | 6x+2=2x+26 | | 27-11x=11+5x | | (2y+6)(2y+6)+y^2=36 | | x-0.07=.7x | | secx-2=0 | | 15+y=6+2x | | X^2+y^2-28x+196=0 | | (2x-3)(8x+5)= | | 18x^2-18x-8=0 | | an=2n+n^3 | | m=-9.2+3.333333n |

Equations solver categories