9x^2-39x+42=0

Simple and best practice solution for 9x^2-39x+42=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 9x^2-39x+42=0 equation:


Simplifying
9x2 + -39x + 42 = 0

Reorder the terms:
42 + -39x + 9x2 = 0

Solving
42 + -39x + 9x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(14 + -13x + 3x2) = 0

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

Ignore the factor 3.

Subproblem 1

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Subproblem 2

Set the factor '(7 + -3x)' equal to zero and attempt to solve: Simplifying 7 + -3x = 0 Solving 7 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -3x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 0 + -7 -3x = 0 + -7 Combine like terms: 0 + -7 = -7 -3x = -7 Divide each side by '-3'. x = 2.333333333 Simplifying x = 2.333333333

Solution

x = {2, 2.333333333}

See similar equations:

| 5x-2+5x=118 | | 9=8-2y | | 6=8-2y | | -3a^2=-174 | | -25=5w+5 | | 3=8-2y | | 5y+2+3y=-15 | | 8x+4(3-2x)=12 | | 36.50+0.10m=50 | | 5+2x+7x=-76 | | 41=4y+13 | | 20s^2+11s-3=0 | | 10a+5b=10 | | 3.5s+13=23.5 | | 4=3+2y | | (x+4)=37 | | 4.9t^2+20t+1=0 | | -28-(-42)=x(10) | | 22+x=6x-22 | | -30x=9x^2-2 | | 14r^2-11r+2=0 | | 1000000*1000000000= | | -3+4v=-15 | | -28-(-42)=x | | 10t+5=-15 | | 2k+5=56+6k-9 | | -.75=w-1 | | 8=x^2-3x | | (4x-3y)2= | | -3(x-1)=x-3 | | -10x^2=-920 | | 3+5.2x=-2.8x |

Equations solver categories