2b^2-b=12

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


Simplifying
2b2 + -1b = 12

Reorder the terms:
-1b + 2b2 = 12

Solving
-1b + 2b2 = 12

Solving for variable 'b'.

Reorder the terms:
-12 + -1b + 2b2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + -1b + 2b2 = 0

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

Divide each side by '2'.
-6 + -0.5b + b2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -0.5b + 6 + b2 = 0 + 6

Reorder the terms:
-6 + 6 + -0.5b + b2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -0.5b + b2 = 0 + 6
-0.5b + b2 = 0 + 6

Combine like terms: 0 + 6 = 6
-0.5b + b2 = 6

The b term is -0.5b.  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.
-0.5b + 0.0625 + b2 = 6 + 0.0625

Reorder the terms:
0.0625 + -0.5b + b2 = 6 + 0.0625

Combine like terms: 6 + 0.0625 = 6.0625
0.0625 + -0.5b + b2 = 6.0625

Factor a perfect square on the left side:
(b + -0.25)(b + -0.25) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(b + -0.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

b + -0.25 = 2.46221445 Simplifying b + -0.25 = 2.46221445 Reorder the terms: -0.25 + b = 2.46221445 Solving -0.25 + b = 2.46221445 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + b = 2.46221445 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + b = 2.46221445 + 0.25 b = 2.46221445 + 0.25 Combine like terms: 2.46221445 + 0.25 = 2.71221445 b = 2.71221445 Simplifying b = 2.71221445

Subproblem 2

b + -0.25 = -2.46221445 Simplifying b + -0.25 = -2.46221445 Reorder the terms: -0.25 + b = -2.46221445 Solving -0.25 + b = -2.46221445 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + b = -2.46221445 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + b = -2.46221445 + 0.25 b = -2.46221445 + 0.25 Combine like terms: -2.46221445 + 0.25 = -2.21221445 b = -2.21221445 Simplifying b = -2.21221445

Solution

The solution to the problem is based on the solutions from the subproblems. b = {2.71221445, -2.21221445}

See similar equations:

| 7x+5=4x+14 | | 6X-2Y=5 | | 3x+(2x+5)=100 | | x-13=-1/2 | | 7-2n=5+8n | | 3(2x+2)=6 | | x-27=5 | | 5+x=-3+1 | | 2x-4(4x-9)=6(5x-4) | | 12x-14=6x-24 | | 0=10+2(3-2x) | | 6x-6=8x-7 | | 0=10-2(3+2x) | | 3(4x-5)=2x+5 | | 0=10+2(3+2x) | | -5/8x=10 | | 4(x-7)=3x-32 | | (2/3)-(3m/2)=4 | | 27x=-54 | | (2/3)-(m/2)=4 | | 3.8x=2.8x-3.6 | | 2/3-m/2=4 | | x-3/8=5/6 | | 9x-3=8x+9 | | x+3(1.6)-7=0 | | 1/2(1+x)=7 | | 1099=250+6.5a-100 | | 4g-5=15 | | y(10y-46)+48=0 | | y(10t-46)+48=0 | | 3f-3=9 | | 4+3/5h=7/5h-1 |

Equations solver categories