21x^2-9x=

Simple and best practice solution for 21x^2-9x= 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 21x^2-9x= equation:


Simplifying
21x2 + -9x = 0

Reorder the terms:
-9x + 21x2 = 0

Solving
-9x + 21x2 = 0

Solving for variable 'x'.

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

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-3 + 7x)' equal to zero and attempt to solve: Simplifying -3 + 7x = 0 Solving -3 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 7x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 7x = 0 + 3 7x = 0 + 3 Combine like terms: 0 + 3 = 3 7x = 3 Divide each side by '7'. x = 0.4285714286 Simplifying x = 0.4285714286

Solution

x = {0, 0.4285714286}

See similar equations:

| 105-5x=22x+18 | | 21-3y=0 | | 16d+8d+1= | | x-.02x+.06(x-.2x)=66.91 | | 4x^2-14x-6=0 | | 4-8=30 | | 3y-2= | | -(-7-10x+7y)= | | (-4)(5m+2)-3m= | | 4x+11=-28-9x | | -142+4x=-9x+105 | | 7x-84=4x-9 | | -3*1.6+2=-7 | | 4(y+1)=10 | | 64-5x=13x+16 | | 3c^2+9c-8+c-5+12c^2-6c+10= | | 25m-1=0 | | -3c=5 | | 4x^9+32x^8+28x^7= | | r-2r+1=0 | | -3*1.6+2= | | -34-x=44+2x | | 32-12b+b^2= | | 11-8x=33-15x | | -5x-12x=102 | | .75d-.5=2.5 | | -(6x+2-10y)= | | 7j+11=74 | | -1f-13+15f=71 | | 4y-9=0 | | 55-4x=16 | | 2x+7=164x |

Equations solver categories