If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3u(u+7)=0
We multiply parentheses
-3u^2-21u=0
a = -3; b = -21; c = 0;
Δ = b2-4ac
Δ = -212-4·(-3)·0
Δ = 441
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{441}=21$$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-21)-21}{2*-3}=\frac{0}{-6} =0 $$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-21)+21}{2*-3}=\frac{42}{-6} =-7 $
| (-2x+4)-(x-11)=0 | | 3/5x+3=2x-4 | | 5v(v+9)=0 | | -x-11=2x+10= | | 2h(h+2)=0 | | 9x+6=41 | | z(3z+5)=0 | | (-2x+4)+(x-11)=0 | | 2x/3+3=-4 | | 5.5n=-60.5 | | -7/5x+3=24 | | r/3+5=14 | | -4-4x=8x+20 | | 2÷19×y+48=0 | | x/4-5/4=-12/3 | | (6r-7)/(10)=(r)/(4) | | 7/4x+15=9x-14 | | 3c=19 | | x/4+3/16=1 | | 3.00-20x=117 | | p=1.8333333333333 | | 2.8/3/4c=7 | | 3/4c=2.5 | | 1.7x+5=16+0.7x | | 13+13/5x=18+3/5x | | |x=4|=7 | | 2.8-(3/4)c=7 | | 2.6-1/3c=7 | | 2.6-1.3c=7 | | 2.8-1/3c=7 | | 2.8-0.75c=7 | | 3x+10+2x+15=180 |