b^2-7b-36=0

Simple and best practice solution for b^2-7b-36=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^2-7b-36=0 equation:


Simplifying
b2 + -7b + -36 = 0

Reorder the terms:
-36 + -7b + b2 = 0

Solving
-36 + -7b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -7b + 36 + b2 = 0 + 36

Reorder the terms:
-36 + 36 + -7b + b2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -7b + b2 = 0 + 36
-7b + b2 = 0 + 36

Combine like terms: 0 + 36 = 36
-7b + b2 = 36

The b term is -7b.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7b + 12.25 + b2 = 36 + 12.25

Reorder the terms:
12.25 + -7b + b2 = 36 + 12.25

Combine like terms: 36 + 12.25 = 48.25
12.25 + -7b + b2 = 48.25

Factor a perfect square on the left side:
(b + -3.5)(b + -3.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(b + -3.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

b + -3.5 = 6.946221995 Simplifying b + -3.5 = 6.946221995 Reorder the terms: -3.5 + b = 6.946221995 Solving -3.5 + b = 6.946221995 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + b = 6.946221995 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + b = 6.946221995 + 3.5 b = 6.946221995 + 3.5 Combine like terms: 6.946221995 + 3.5 = 10.446221995 b = 10.446221995 Simplifying b = 10.446221995

Subproblem 2

b + -3.5 = -6.946221995 Simplifying b + -3.5 = -6.946221995 Reorder the terms: -3.5 + b = -6.946221995 Solving -3.5 + b = -6.946221995 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + b = -6.946221995 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + b = -6.946221995 + 3.5 b = -6.946221995 + 3.5 Combine like terms: -6.946221995 + 3.5 = -3.446221995 b = -3.446221995 Simplifying b = -3.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. b = {10.446221995, -3.446221995}

See similar equations:

| (e-b)(c-d)= | | 21-6x=9 | | -243^(3/5) | | 3y-1+2x-4+x+3+15= | | 8x+46=5(x+5) | | 3n-4l= | | 6x^2=15 | | 6.1x-1.5=10.7 | | 2x+4=12+x | | (3^√7y^5)/(3^√64x^6) | | 6(4z-1)-5(z+3)=12(z+1) | | 4+7(x-1)=4-9(x-5) | | 9z-5=16+6z | | (y^2+4)=2y^2-y-10 | | 4*(2x-3)=5(x+2) | | v=(1/3)pir^2h | | 3n-17=-19+4n | | -8*(8-1)=-16 | | x^2+6*x-3600=0 | | 1.5m+1.0m=7.5 | | 0=4(x^2+49)(x^2-36)(x-7) | | 1/5n=3.1 | | 18=3z+17 | | 35=8m+15 | | -16x+5= | | h-5=16 | | 5-(y-3)=2y+3 | | 3-b=4 | | 6=k/100 | | 6=m/00 | | 1/2m=3 | | 1/2=3 |

Equations solver categories