3x(4x-5x)=21

Simple and best practice solution for 3x(4x-5x)=21 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(4x-5x)=21 equation: 



3x(4x-5x)=21

We move all terms to the left:

3x(4x-5x)-(21)=0

We add all the numbers together, and all the variables

3x(-1x)-21=0

We multiply parentheses

-3x^2-21=0

a = -3; b = 0; c = -21;
Δ = b2-4ac
Δ = 02-4·(-3)·(-21)
Δ = -252
Delta is less than zero, so there is no solution for the equation

See similar equations:

| 9+2(y-3)=3(y-2)+1 | | -17=n+-6 | | x=0.45x60 | | 5÷6x=1÷3 | | 15x-24=8(10+3x)-2 | | -4(x-2)=-4 | | 42t+50t+88=108 | | -z=5.9 | | 3.1x=93 | | 3y+4=2(y+2) | | 36+6a+(11+a)=180 | | 4x-(x-36)=3(x+12) | | 30/40=x/16 | | X^+20x+8=0 | | 10y+9-3+1=59 | | 214q+7/2-3q=9+25q | | 3y-5=y+2y-8 | | x2–3x=–8 | | 9x^2-72x=-129 | | 180=x+6 | | 7t-2=10t-2-3t | | 1/2b-1=2 | | 7t-2=10t-2-3t | | 3(a-2)=3a-2 | | 3/7=k/4.3 | | 3/7=k/2.4 | | 5x(8)=140 | | -11=-5+w/3 | | 5x+6=96−4x | | 3x+2=8,x=3 | | 6x²+30x+18=0 | | |x+4|=|2x+7| |

Equations solver categories