5x(x-3)=20

Simple and best practice solution for 5x(x-3)=20 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 5x(x-3)=20 equation:


Simplifying
5x(x + -3) = 20

Reorder the terms:
5x(-3 + x) = 20
(-3 * 5x + x * 5x) = 20
(-15x + 5x2) = 20

Solving
-15x + 5x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + -15x + 5x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + -15x + 5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-4 + -3x + x2) = 0

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

Ignore the factor 5.

Subproblem 1

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

Subproblem 2

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

Solution

x = {-1, 4}

See similar equations:

| 9x-93=4x-13 | | 9cos(2x)=-9cosx | | 2s^2+15s^2=3s^2 | | 2x+4=8-(4x-4) | | 3x(7-2y)-2y=-3 | | 3u-42=9(u-6) | | 5000=20(40+2x) | | 18=4(x-7)-2 | | 5(x-3)-1=-31 | | 13v=7v+18 | | 3(x+1)+4x=-25 | | 5=-3.7 | | 3f-4=6a-12 | | 16x+25=1 | | 6n^2-35=-11 | | 4(x+1)+4=-12 | | -f(x)=4x^2+2x-4 | | 24x+36xy= | | 2v=36-4 | | x^2-6.2x-21.7=0 | | 15v=8v+35 | | 81/9*(10-1)=? | | 10/3v=25 | | Sin=-4 | | 10/ev=25 | | 75.00+7.50x= | | 3y=5y-20 | | 6 = b3+ 4 | | 3f-4=4f-12 | | 17x+16=50 | | .25sin+1=0 | | 6w=8+4w |

Equations solver categories