84x^2+81x+15=

Simple and best practice solution for 84x^2+81x+15= 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 84x^2+81x+15= equation:


Simplifying
84x2 + 81x + 15 = 0

Reorder the terms:
15 + 81x + 84x2 = 0

Solving
15 + 81x + 84x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(5 + 27x + 28x2) = 0

Factor a trinomial.
3((5 + 7x)(1 + 4x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(5 + 7x)' equal to zero and attempt to solve: Simplifying 5 + 7x = 0 Solving 5 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 7x = 0 + -5 7x = 0 + -5 Combine like terms: 0 + -5 = -5 7x = -5 Divide each side by '7'. x = -0.7142857143 Simplifying x = -0.7142857143

Subproblem 2

Set the factor '(1 + 4x)' equal to zero and attempt to solve: Simplifying 1 + 4x = 0 Solving 1 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 4x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 4x = 0 + -1 4x = 0 + -1 Combine like terms: 0 + -1 = -1 4x = -1 Divide each side by '4'. x = -0.25 Simplifying x = -0.25

Solution

x = {-0.7142857143, -0.25}

See similar equations:

| 4x-97=x+5 | | 4x^2+7x-72=0 | | x^2-2ix-10=0 | | -7-(-3)+(-6)= | | 6x+6-8x=12-16x+14x-6 | | -3(-4y-2x)-(2x+4y)-4(-5x+3x)-(4y+5)= | | 3h^2+17h=0 | | -(1/4)+z=3/4 | | 0=m-3+2m | | (x)(32-x)=48 | | 12-2/3x=6 | | 32p-4q= | | 10=a | | x+31=6x+1 | | 32p-4p= | | 7-9n=-11 | | x+63=53 | | 7x-3=5x+20 | | 4x-5=5+4 | | (x)(-x+32)=48 | | 10x+2=-14 | | -15+(-6)-19= | | 36x^2+y^2+36z^2=36 | | 0=-4t^2+6t-1 | | 2k^3-8k=0 | | -6x+0=24 | | 4x-4y=-72 | | 3q^2+a-14=0 | | -6(-4+y)+y=24 | | ln(5x-10)=ln(19) | | ln(5x+10)=ln(19) | | 0.7x-0.3=0.6x+5 |

Equations solver categories