b^2-5b-84=0

Simple and best practice solution for b^2-5b-84=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^2-5b-84=0 equation:


Simplifying
b2 + -5b + -84 = 0

Reorder the terms:
-84 + -5b + b2 = 0

Solving
-84 + -5b + b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-7 + -1b)(12 + -1b) = 0

Subproblem 1

Set the factor '(-7 + -1b)' equal to zero and attempt to solve: Simplifying -7 + -1b = 0 Solving -7 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1b = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1b = 0 + 7 -1b = 0 + 7 Combine like terms: 0 + 7 = 7 -1b = 7 Divide each side by '-1'. b = -7 Simplifying b = -7

Subproblem 2

Set the factor '(12 + -1b)' equal to zero and attempt to solve: Simplifying 12 + -1b = 0 Solving 12 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1b = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1b = 0 + -12 -1b = 0 + -12 Combine like terms: 0 + -12 = -12 -1b = -12 Divide each side by '-1'. b = 12 Simplifying b = 12

Solution

b = {-7, 12}

See similar equations:

| -2x+4+5x=-8 | | x+3+2x=15 | | 7x+5=2x+45 | | (3y-5)(2y+7)=0 | | 5x-c+6+3c=-2c+6 | | 15x^2+4x-4=0 | | 3.1x=-13.95 | | 5+x=-1 | | 7n-10=67 | | 4x+7x=33 | | -5y=2.15 | | 4.5p+7-3p=17-9p+12 | | 9x-6=5x+5 | | -17x^2-196X=525 | | (7-4i)(7+4i)= | | 8x+3=9x-6 | | 4x+15=5(x+4) | | x^2-2x-27=0 | | 2x+2=6(x+3) | | 3(9x-7)+13x= | | x^2=8x-7 | | 4(3c+2)=2c-2 | | (4x+16)(2x-8)=0 | | (5x+30)(3x+27)=0 | | 6v^2-25v+20=0 | | 4t^2-7t+3=0 | | y=mx+g | | 48p-13+12p=72p-3-24p | | 12x^2-8x+8=0 | | 15+4y-4=12y-1-20y | | 12x-5=18x+1 | | 18p-13+12p=72p-24p |

Equations solver categories