15b^2-84b-36=

Simple and best practice solution for 15b^2-84b-36= 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 15b^2-84b-36= equation:


Simplifying
15b2 + -84b + -36 = 0

Reorder the terms:
-36 + -84b + 15b2 = 0

Solving
-36 + -84b + 15b2 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-12 + -28b + 5b2) = 0

Factor a trinomial.
3((-2 + -5b)(6 + -1b)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -5b)' equal to zero and attempt to solve: Simplifying -2 + -5b = 0 Solving -2 + -5b = 0 Move all terms containing b to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -5b = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5b = 0 + 2 -5b = 0 + 2 Combine like terms: 0 + 2 = 2 -5b = 2 Divide each side by '-5'. b = -0.4 Simplifying b = -0.4

Subproblem 2

Set the factor '(6 + -1b)' equal to zero and attempt to solve: Simplifying 6 + -1b = 0 Solving 6 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1b = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1b = 0 + -6 -1b = 0 + -6 Combine like terms: 0 + -6 = -6 -1b = -6 Divide each side by '-1'. b = 6 Simplifying b = 6

Solution

b = {-0.4, 6}

See similar equations:

| 1/2x+3=10 | | 8x-79=5x-13 | | 4y^2+26y-90= | | y^2-9y+1=0 | | 14=14+7 | | 10-x=13 | | 4-12w+9w^2= | | 36-84s+49s^2= | | 18=y+10 | | 11x^2-8x-3= | | (4t-9)(4t+9)= | | a^2+2ad-35d^2= | | x^3=72 | | t^2-9t-36= | | x^4-9x^3-36x^2= | | 64=-16t^2+48t+64 | | -2t-63+t^2= | | 1.10/18 | | v^2+v+5= | | b^2-13b+40= | | v^2+11v+30= | | 13.5/19 | | t^2+11t+24= | | 12.5/11 | | b^2+10b+24= | | 12.5/13 | | 12.5/12 | | x=199-9 | | 63x^3-36x^2+35x-20= | | 12.5/17 | | 24x^3y+16x^2y-30xy=0 | | 5x^5+5x^4-35x^3+15x^2= |

Equations solver categories