If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21x^2+42x=0
a = 21; b = 42; c = 0;
Δ = b2-4ac
Δ = 422-4·21·0
Δ = 1764
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1764}=42$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(42)-42}{2*21}=\frac{-84}{42} =-2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(42)+42}{2*21}=\frac{0}{42} =0 $
| 4x=+38) | | X+x+6-2=24 | | 2w+w=30-w | | 9x+1=x2+36 | | 2x-15)+(2x-15)+x+x=360 | | -13+p=-27 | | 560=7x | | 5y-9=1y+5 | | -3x-2.5+7.5=30-5x | | 5=-(4+m) | | 2x-3-4x=11 | | 1.8x-11.2=45.5 | | -3x-2.5+7.5=3” | | x=4x+38=2x-18= | | 3=13+b | | 4.5(-2.5x+3)=15 | | 3=m-84/5 | | 7x–(2x–9)+(3x+8)–(5x+6)=5 | | 1=526x-52 | | 7=-2(1)+c | | 1=16+y | | 4x+12-8=2x+3-2x | | -4-5-b=1/3b+16 | | -3x7=28 | | -45=5(1+r) | | 3=10z+23 | | 228=180-w | | 33=9-8w | | 3.12x-7.81=9.01 | | (3x)°+18°=180°;x= | | 11+3n=50 | | 44x+88=748 |