b^2-2b-2=0

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


Simplifying
b2 + -2b + -2 = 0

Reorder the terms:
-2 + -2b + b2 = 0

Solving
-2 + -2b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -2b + 2 + b2 = 0 + 2

Reorder the terms:
-2 + 2 + -2b + b2 = 0 + 2

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

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

The b term is -2b.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2b + 1 + b2 = 2 + 1

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

Combine like terms: 2 + 1 = 3
1 + -2b + b2 = 3

Factor a perfect square on the left side:
(b + -1)(b + -1) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(b + -1) equal to 1.732050808 and -1.732050808.

Subproblem 1

b + -1 = 1.732050808 Simplifying b + -1 = 1.732050808 Reorder the terms: -1 + b = 1.732050808 Solving -1 + b = 1.732050808 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = 1.732050808 + 1 Combine like terms: -1 + 1 = 0 0 + b = 1.732050808 + 1 b = 1.732050808 + 1 Combine like terms: 1.732050808 + 1 = 2.732050808 b = 2.732050808 Simplifying b = 2.732050808

Subproblem 2

b + -1 = -1.732050808 Simplifying b + -1 = -1.732050808 Reorder the terms: -1 + b = -1.732050808 Solving -1 + b = -1.732050808 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + b = -1.732050808 + 1 Combine like terms: -1 + 1 = 0 0 + b = -1.732050808 + 1 b = -1.732050808 + 1 Combine like terms: -1.732050808 + 1 = -0.732050808 b = -0.732050808 Simplifying b = -0.732050808

Solution

The solution to the problem is based on the solutions from the subproblems. b = {2.732050808, -0.732050808}

See similar equations:

| 91=3x(x-14) | | 25x^2=8x | | (x-1/6)=10 | | -3(8y+7)-3y=3(y-5)-3 | | 5(k+2)+4k=2k+38 | | -23=-6j+3j+4 | | x-1/6=10 | | 5x^3+2x^2+15x+6= | | (3.6y-7.6)-(8.7y-3.5)= | | 114-x=256 | | 9.99x+.25v=113.74 | | 3+x+4=12+3x-7x | | 16x-4y=96000 | | x/3-57 | | 3x^5-108x=0 | | 3x+17-5x=12-[6x+3] | | 8(y+2)-7(y+1)=5 | | 4n^3-13n=0 | | 264=174-y | | 19x^2=15x-10x^3 | | 3(-0.8+-0.4y)+2y=0 | | 4r^-3/10r^-12 | | 4x-2(x-9)=3(x+7) | | x-14.37=4.57 | | 3a-8a+14a-12a-8a+5a= | | .2(2x-4)+x=7 | | 3(x-16)+6x=60 | | 3(3)*7= | | 3x+15=18+9x | | 6x+7=4-(2x-4) | | 2x^4+x^3-53x^2-14x+20=0 | | -6a-2-12(a-5)= |

Equations solver categories