3x^2-30=-9x

Simple and best practice solution for 3x^2-30=-9x 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 3x^2-30=-9x equation:


Simplifying
3x2 + -30 = -9x

Reorder the terms:
-30 + 3x2 = -9x

Solving
-30 + 3x2 = -9x

Solving for variable 'x'.

Reorder the terms:
-30 + 9x + 3x2 = -9x + 9x

Combine like terms: -9x + 9x = 0
-30 + 9x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-10 + 3x + x2) = 0

Factor a trinomial.
3((-5 + -1x)(2 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

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

Solution

x = {-5, 2}

See similar equations:

| 8n+3n= | | 1/4y=20 | | -(6x-1)+6x=11 | | x=140+1.3y | | 56=5u-14 | | 3x-4y=420 | | 141.5512=2*3.14*r*7.5+2*3.14*r^2 | | 35=-2x-15-3x | | 15x-20000=24000 | | -10x(x-5)=-8(x+9) | | 2=-9+w | | 13+(5a+3)= | | 2(9-1)-5a=7 | | 3x-4x=420 | | 45x^2+94x+48=0 | | ax-w=3forw | | 7x=9(2+x) | | 1x+500=1200 | | 7x+150=15x | | 34=2v+10 | | 48-3n^2=0 | | .9*.3= | | u/3-13=30 | | f=1.8*15+32 | | (3/4)-r(r-1/2)=r(3-r) | | 3(m-15)+1=2m+2-9 | | 11-T/2=T/4-14 | | X^(-2)-x^(-1)=5/6 | | -65-5x=61-11x | | 3a-19=4+a | | 6+-8=2(2x+1) | | 11.9=7x |

Equations solver categories