b^2-12b+9=0

Simple and best practice solution for b^2-12b+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 b^2-12b+9=0 equation:


Simplifying
b2 + -12b + 9 = 0

Reorder the terms:
9 + -12b + b2 = 0

Solving
9 + -12b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -12b + -9 + b2 = 0 + -9

Reorder the terms:
9 + -9 + -12b + b2 = 0 + -9

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

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

The b term is -12b.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12b + 36 + b2 = -9 + 36

Reorder the terms:
36 + -12b + b2 = -9 + 36

Combine like terms: -9 + 36 = 27
36 + -12b + b2 = 27

Factor a perfect square on the left side:
(b + -6)(b + -6) = 27

Calculate the square root of the right side: 5.196152423

Break this problem into two subproblems by setting 
(b + -6) equal to 5.196152423 and -5.196152423.

Subproblem 1

b + -6 = 5.196152423 Simplifying b + -6 = 5.196152423 Reorder the terms: -6 + b = 5.196152423 Solving -6 + b = 5.196152423 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + b = 5.196152423 + 6 Combine like terms: -6 + 6 = 0 0 + b = 5.196152423 + 6 b = 5.196152423 + 6 Combine like terms: 5.196152423 + 6 = 11.196152423 b = 11.196152423 Simplifying b = 11.196152423

Subproblem 2

b + -6 = -5.196152423 Simplifying b + -6 = -5.196152423 Reorder the terms: -6 + b = -5.196152423 Solving -6 + b = -5.196152423 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + b = -5.196152423 + 6 Combine like terms: -6 + 6 = 0 0 + b = -5.196152423 + 6 b = -5.196152423 + 6 Combine like terms: -5.196152423 + 6 = 0.803847577 b = 0.803847577 Simplifying b = 0.803847577

Solution

The solution to the problem is based on the solutions from the subproblems. b = {11.196152423, 0.803847577}

See similar equations:

| 2(2+x)-8=0 | | 3-x=10-2x | | (6b-7)=(10b-19) | | x.3+0.6=-0.14 | | x-3=10-2x | | x+y=x^2+y^2 | | 8x^2+x=12 | | -16t^2+84t+5=0 | | 3(2x+4)=6(5x+12) | | 20d^2+5d^3-60d=0 | | -16t^2+84t+5=s | | x^2+13x+18=4x+4 | | 9k-4=3k+38 | | (2x-6)*3=3+3x | | t(n)=35-3n | | x^2-3x-12=-9x-5 | | 2x-3=x+(x+5) | | 4z-16=-26+6z | | 15(4x)=3 | | 4s-19=-1+6s | | 6.4-2x-6.63x= | | 13x^2-2x+1= | | h=68t-8t^2 | | R^2-4.5R+4.5=0 | | 2k^2+16k=18 | | 25uv^2(4u-v)+15u^2v(v-4u)= | | 5(3-3x)-3=87 | | 25(3x+13)=45 | | 5x-15=x+1 | | x^2+6x+abs(x-3)+5=0 | | 8x^6y+6x^4y^2+6x^4y^3= | | 3-((3*6)+2)=a |

Equations solver categories