4b^2-16b=84

Simple and best practice solution for 4b^2-16b=84 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 4b^2-16b=84 equation:


Simplifying
4b2 + -16b = 84

Reorder the terms:
-16b + 4b2 = 84

Solving
-16b + 4b2 = 84

Solving for variable 'b'.

Reorder the terms:
-84 + -16b + 4b2 = 84 + -84

Combine like terms: 84 + -84 = 0
-84 + -16b + 4b2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-21 + -4b + b2) = 0

Factor a trinomial.
4((-3 + -1b)(7 + -1b)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-3 + -1b)' equal to zero and attempt to solve: Simplifying -3 + -1b = 0 Solving -3 + -1b = 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 + -1b = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1b = 0 + 3 -1b = 0 + 3 Combine like terms: 0 + 3 = 3 -1b = 3 Divide each side by '-1'. b = -3 Simplifying b = -3

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 = {-3, 7}

See similar equations:

| n+8=-9 | | M=12y | | 5n-3=32 | | -5(x-8)-(-9x-1)=3x | | K=c+273 | | 22+5x=2(5+x)-6 | | 28=4(x+2) | | y=(x+3)(x+12) | | 7c-4=-32 | | 3x+-1=20 | | 18x-3(3x+2)=-33 | | x^2-18x+77=0 | | 21=42+7k | | x+x+1=133 | | 9z+7z=-5-4+6z | | 4x^2+20x+29=0 | | 50=6d+8 | | 4x^2+29=-20x | | -8-2e=320 | | N-2+4n-5=13 | | x^2+2x-48=0 | | 16=2w+6 | | 42=x+18 | | x^2+x=12 | | 8m-7=17 | | 6u-8=28 | | x+x+1=137 | | x^2-18+17=0 | | x^4-5x^3-14x^2=0 | | 12x+2(x-5)=18 | | -3x^28+75=0 | | -9o=4o+104 |

Equations solver categories