b^2-8b=10

Simple and best practice solution for b^2-8b=10 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^2-8b=10 equation:


Simplifying
b2 + -8b = 10

Reorder the terms:
-8b + b2 = 10

Solving
-8b + b2 = 10

Solving for variable 'b'.

Reorder the terms:
-10 + -8b + b2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -8b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -8b + 10 + b2 = 0 + 10

Reorder the terms:
-10 + 10 + -8b + b2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -8b + b2 = 0 + 10
-8b + b2 = 0 + 10

Combine like terms: 0 + 10 = 10
-8b + b2 = 10

The b term is -8b.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8b + 16 + b2 = 10 + 16

Reorder the terms:
16 + -8b + b2 = 10 + 16

Combine like terms: 10 + 16 = 26
16 + -8b + b2 = 26

Factor a perfect square on the left side:
(b + -4)(b + -4) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(b + -4) equal to 5.099019514 and -5.099019514.

Subproblem 1

b + -4 = 5.099019514 Simplifying b + -4 = 5.099019514 Reorder the terms: -4 + b = 5.099019514 Solving -4 + b = 5.099019514 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + b = 5.099019514 + 4 Combine like terms: -4 + 4 = 0 0 + b = 5.099019514 + 4 b = 5.099019514 + 4 Combine like terms: 5.099019514 + 4 = 9.099019514 b = 9.099019514 Simplifying b = 9.099019514

Subproblem 2

b + -4 = -5.099019514 Simplifying b + -4 = -5.099019514 Reorder the terms: -4 + b = -5.099019514 Solving -4 + b = -5.099019514 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + b = -5.099019514 + 4 Combine like terms: -4 + 4 = 0 0 + b = -5.099019514 + 4 b = -5.099019514 + 4 Combine like terms: -5.099019514 + 4 = -1.099019514 b = -1.099019514 Simplifying b = -1.099019514

Solution

The solution to the problem is based on the solutions from the subproblems. b = {9.099019514, -1.099019514}

See similar equations:

| (2x+15)=(3x-5) | | 2tan(3x)=7 | | F(x)=4x^2-16 | | 2(x-2)=52-5x | | 103=x^2+5 | | 3(2x-3)+3(x-2)+2(2x+1)=5(x-1) | | 4x+18=35+5x | | (4x+1)=(6x-5) | | 2r^2=6r+20 | | 4x^5-20x^4-36x^3= | | 120-12(3-4(2*3-2*(-8)))= | | 5y/8-2=7y/12 | | 5(6y-5)=11(3y-2) | | F=5e-3 | | 0,36x-2,3=0,5(0,4x+1,2) | | 3x+17x-4=5(4x+2) | | g^2-28g+196= | | 3k^2=16 | | 9x+6x-5=15x+3 | | 4x-2=360 | | 3.7=-log(x) | | -26=-3t^2+28 | | -26=-3t+8 | | 2*ln(x)-ln(5)=ln(2) | | 3xy(z-5)+4m(5-z)=0 | | x-2(18/4)=3 | | 7y^2(x-5)-5(x-5)=0 | | -2a^2+19=-21 | | 3x+4=3(x+1)+1 | | T(n)=4n+2 | | 2x-xsquared+16=0 | | 3x+4=3(x+1) |

Equations solver categories