b^2-9b=-20

Simple and best practice solution for b^2-9b=-20 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^2-9b=-20 equation:


Simplifying
b2 + -9b = -20

Reorder the terms:
-9b + b2 = -20

Solving
-9b + b2 = -20

Solving for variable 'b'.

Reorder the terms:
20 + -9b + b2 = -20 + 20

Combine like terms: -20 + 20 = 0
20 + -9b + b2 = 0

Factor a trinomial.
(4 + -1b)(5 + -1b) = 0

Subproblem 1

Set the factor '(4 + -1b)' equal to zero and attempt to solve: Simplifying 4 + -1b = 0 Solving 4 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1b = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1b = 0 + -4 -1b = 0 + -4 Combine like terms: 0 + -4 = -4 -1b = -4 Divide each side by '-1'. b = 4 Simplifying b = 4

Subproblem 2

Set the factor '(5 + -1b)' equal to zero and attempt to solve: Simplifying 5 + -1b = 0 Solving 5 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1b = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1b = 0 + -5 -1b = 0 + -5 Combine like terms: 0 + -5 = -5 -1b = -5 Divide each side by '-1'. b = 5 Simplifying b = 5

Solution

b = {4, 5}

See similar equations:

| 1+5v=-14+2v | | x/-5=-11 | | 9-5x=(-40) | | 0=1/3x+3 | | -.5+8=x-7 | | 6+2u=(-7) | | 0=1/3(0)+3 | | a-8-5=a-16 | | 2+5x-8=64 | | 17x+15y=11 | | 4y-1=(-21) | | y=1/3(-3)+3 | | p+3=-6+p+6-3p | | Y=1/2(x-8) | | k-8=-17 | | A+5A+(4A-9)=180 | | 6(5-p)=6 | | (x/2)^-4 | | 5/4y-7=11/4-1/4,y | | -1.9(-2p-5)+4.5p= | | -11n=121 | | m+r=12 | | 2x+2y^2=12 | | 8(2-3p)=184 | | 1/3x-13=23-1/3x | | 7m+42=-7 | | 2dx-3dy^3=0 | | 2(3x-4)=2x+3 | | -5x+6y=3 | | y^4-16y=19 | | 1-3x=1-3x | | 7(-5a+2)=14+2a |

Equations solver categories