2b^2-11b-21=0

Simple and best practice solution for 2b^2-11b-21=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 2b^2-11b-21=0 equation:


Simplifying
2b2 + -11b + -21 = 0

Reorder the terms:
-21 + -11b + 2b2 = 0

Solving
-21 + -11b + 2b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-3 + -2b)(7 + -1b) = 0

Subproblem 1

Set the factor '(-3 + -2b)' equal to zero and attempt to solve: Simplifying -3 + -2b = 0 Solving -3 + -2b = 0 Move all terms containing b to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -2b = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -2b = 0 + 3 -2b = 0 + 3 Combine like terms: 0 + 3 = 3 -2b = 3 Divide each side by '-2'. b = -1.5 Simplifying b = -1.5

Subproblem 2

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

Solution

b = {-1.5, 7}

See similar equations:

| 3[4-3m]=30 | | 22u+74=17u+114 | | 960=w(2w+8) | | -x-5y+5y-6x=a | | onethirdx+14=5 | | 2n-6=4n+0 | | 0=19-3x | | 4r+7+6t=-33 | | -8(0)-3y=-24 | | 8p-8=-1 | | 4(3n-3)=(4n+7)+2 | | (2n-5)*18=450 | | 9b^2-27b+20=0 | | 4(x+2)+320=0 | | 9s^2-13s-10=0 | | 2c+5=4+6c | | 10x-20=-3(20x-4) | | 5*3.4-11-5=-11 | | 3(x+4)+5(x+3)=59 | | 2x+8x=6+3x | | 4x+3(3-2x)=6 | | 5x-2x-8=-9+5+13 | | (e^8x+4)-e=0 | | r^2-8r+10=3 | | X+10-6x=-35 | | 3x-8=70 | | -12x-1=-7x+9 | | 2245=300(1+.5)t | | 7x-2y=p | | 9w-3w=30 | | A=7y-2x | | -8(-8x-16)=-6x-22 |

Equations solver categories