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:
b2 = -20 + -9b

Solving
b2 = -20 + -9b

Solving for variable 'b'.

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

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

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

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

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

Subproblem 1

Set the factor '(5 + b)' equal to zero and attempt to solve: Simplifying 5 + b = 0 Solving 5 + b = 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 + b = 0 + -5 Combine like terms: 5 + -5 = 0 0 + b = 0 + -5 b = 0 + -5 Combine like terms: 0 + -5 = -5 b = -5 Simplifying b = -5

Subproblem 2

Set the factor '(4 + b)' equal to zero and attempt to solve: Simplifying 4 + b = 0 Solving 4 + b = 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 + b = 0 + -4 Combine like terms: 4 + -4 = 0 0 + b = 0 + -4 b = 0 + -4 Combine like terms: 0 + -4 = -4 b = -4 Simplifying b = -4

Solution

b = {-5, -4}

See similar equations:

| x-5/2-1=x-5/3 | | 0.1(80)=0.3(50+x)-0.5x | | 3(3x-4)=4(2x+6)-20 | | -3+7x=39 | | x-1/3-4=x-7/2 | | -16t^2+489=h | | 4[2x-(3-x)+5]=7x-2 | | 6(x+3)=8x+6-2x+12 | | 2x+3=2x+5-2 | | 2b+12=5b-15 | | 0.4x-0.5(5)=0.3 | | 7+3(5x-4)=9-5(2x+1) | | y=25x-15 | | 5x-4=-d+12 | | 6+4(5x-5)=8-5(2x+1) | | v^2-v-36=6 | | 20x-10-11x=6x+11 | | 8(x+7)-(3x-4)=4 | | 5*(2x+1)=12x-3 | | 2(3)x3-(24/6) | | 0.75n=n+19 | | 5x-50y=30 | | 9(x+4)+10=11x-2(x-4) | | 5n/26 | | 4cos^5(x)=f(x) | | 3x^2-23x+84=0 | | 22/a=3/4 | | n+(-5n)= | | x*x=90 | | 3(x+6)-6x=-7 | | 3x+7=5x-10 | | 3x^2-16x=-5 |

Equations solver categories