8b^2-b-2=0

Simple and best practice solution for 8b^2-b-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 8b^2-b-2=0 equation:


Simplifying
8b2 + -1b + -2 = 0

Reorder the terms:
-2 + -1b + 8b2 = 0

Solving
-2 + -1b + 8b2 = 0

Solving for variable 'b'.

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

Divide each side by '8'.
-0.25 + -0.125b + b2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -0.125b + 0.25 + b2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -0.125b + b2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -0.125b + b2 = 0 + 0.25
-0.125b + b2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-0.125b + b2 = 0.25

The b term is -0.125b.  Take half its coefficient (-0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
-0.125b + 0.00390625 + b2 = 0.25 + 0.00390625

Reorder the terms:
0.00390625 + -0.125b + b2 = 0.25 + 0.00390625

Combine like terms: 0.25 + 0.00390625 = 0.25390625
0.00390625 + -0.125b + b2 = 0.25390625

Factor a perfect square on the left side:
(b + -0.0625)(b + -0.0625) = 0.25390625

Calculate the square root of the right side: 0.503891109

Break this problem into two subproblems by setting 
(b + -0.0625) equal to 0.503891109 and -0.503891109.

Subproblem 1

b + -0.0625 = 0.503891109 Simplifying b + -0.0625 = 0.503891109 Reorder the terms: -0.0625 + b = 0.503891109 Solving -0.0625 + b = 0.503891109 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + b = 0.503891109 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + b = 0.503891109 + 0.0625 b = 0.503891109 + 0.0625 Combine like terms: 0.503891109 + 0.0625 = 0.566391109 b = 0.566391109 Simplifying b = 0.566391109

Subproblem 2

b + -0.0625 = -0.503891109 Simplifying b + -0.0625 = -0.503891109 Reorder the terms: -0.0625 + b = -0.503891109 Solving -0.0625 + b = -0.503891109 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + b = -0.503891109 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + b = -0.503891109 + 0.0625 b = -0.503891109 + 0.0625 Combine like terms: -0.503891109 + 0.0625 = -0.441391109 b = -0.441391109 Simplifying b = -0.441391109

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.566391109, -0.441391109}

See similar equations:

| -3y+3y-9x+9x=3+24 | | 10-3x=32 | | 2x-22=x+2 | | -6x+18=-6forx | | (3x-2)(1-2x)=0 | | 3(-3x-y)=3(8) | | 5-5=18x+6x | | x^3-6x^2-2x+12= | | x*4=1800 | | -1y+y-2x+2x=4+1 | | 4x+17-3x=-6-11 | | k(k+1)-253.2=0 | | 2x^2+27x-30=0 | | x(7)+13=55 | | -1(y)=-1(-2x+1) | | 3x-(2x+3)=5x-4(x-3) | | k^2-20k+100= | | 3x+2y=85 | | 1.8-0.1x+0.9x^2=0 | | 5a-11b-6a+12b= | | -8y+4y-8x+8x=-20+46 | | 3x-4y=55 | | 2(-4x-y)=2(-1) | | 2x-y=2y-2x | | -5(3-2x)+3x=18 | | 4(2x-2y)=4(-5) | | 10x^2+45x+45=0 | | 12x^2+55+52= | | (2m+5)(8m+7)= | | -4y+4y-8x+8x=-24+24 | | p+8=-20 | | 3x-16=11x |

Equations solver categories