If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3x^2+21x-5.7=0
a = 3; b = 21; c = -5.7;
Δ = b2-4ac
Δ = 212-4·3·(-5.7)
Δ = 509.4
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(21)-\sqrt{509.4}}{2*3}=\frac{-21-\sqrt{509.4}}{6} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+\sqrt{509.4}}{2*3}=\frac{-21+\sqrt{509.4}}{6} $
| 90+4(x-5)+x=180 | | 10h+8=-10+8h | | 4f+3=8−f | | (3+4x)(3-4x)=25 | | 5w+1=3+5w | | 18+8x=90 | | (9-x)(x+6)(x+7)=0 | | -7r-10=1-7r | | -4d-5=23 | | 1.4x+18=x | | 7n−20=−3n | | 25.47=4s+3.99 | | 4x=48=9x+12 | | 20/100=10/x | | 5k−6=−8 | | 21/100=10/x | | 3/x+2=15/2x-3 | | 215/100=106/x | | -5.5=1.1x-2.2 | | 4/w-1=-6+5/w+2 | | 5k-10=-34 | | 4n+1.6=6n+.2 | | 18(y-1)=-6(4+y) | | x−5.2=−18.73x | | x^2+14-49=36 | | 6^7x=1296 | | 6(5+w)=5(w-7) | | 21500/100=10624/x | | l+(-6)=2 | | 18-41=5(x-1)-3 | | 3(2c+1)=39 | | 3.7k=15.91 |