7b^2-21b=196

Simple and best practice solution for 7b^2-21b=196 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 7b^2-21b=196 equation:


Simplifying
7b2 + -21b = 196

Reorder the terms:
-21b + 7b2 = 196

Solving
-21b + 7b2 = 196

Solving for variable 'b'.

Reorder the terms:
-196 + -21b + 7b2 = 196 + -196

Combine like terms: 196 + -196 = 0
-196 + -21b + 7b2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-28 + -3b + b2) = 0

Factor a trinomial.
7((-4 + -1b)(7 + -1b)) = 0

Ignore the factor 7.

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 '(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 = {-4, 7}

See similar equations:

| 11=-2(n-12) | | 26+10b=5(2b+4) | | 2x^4-200x^2=0 | | 2x+165=4 | | z^2+2z-4=0 | | 2x^2+y^2=4 | | 2(2m-4)+3=-17 | | -9*94-10y=90 | | 4y^3-20y^2-y+5=0 | | 4x-9=67 | | -9*90-10y=90 | | x-5=4x+38 | | 2u^2-15u-8=0 | | 2(x+3)+5(2x-1)= | | 5n-2=n+13 | | 6x-5=2x+6 | | 3(4m-3k)-(5k-m)= | | -65=5t | | 6x-5=4x+1 | | 3x=2y-10 | | 5x-9-3x=-11 | | (-4)+(-10)= | | 3x-1=2x-3 | | 4(-1+8)=10 | | 22x+2y=4 | | 5ln(4x+2)=20 | | 8=3r+5+4 | | 14+6x=6(1+7x)+8 | | .66(y-3)=.33y | | -2(3x+1)=-26 | | 4-(-10)= | | -10+6y+2=3y-26 |

Equations solver categories