If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3n^2+21n+18=0
a = 3; b = 21; c = +18;
Δ = b2-4ac
Δ = 212-4·3·18
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{225}=15$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(21)-15}{2*3}=\frac{-36}{6} =-6 $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+15}{2*3}=\frac{-6}{6} =-1 $
| 2-b=20 | | 11x-22+5x=180 | | (x+16)=1/3(180-x) | | (a-3)/(3)=(2a-1)/(5) | | (x+16)=(180-x)*0.33333333333333333333 | | -15=-10+k/3 | | (2x+3)=46 | | 18=c+2 | | 3x=6.12 | | 12(5x-4.5)=36. | | 12p=p+44 | | 25x-18=1350 | | 2(3z-5-3)=166-46 | | 6(127+5x)–30x=-1160 | | -11y-4=-11-8y | | 4-y÷8-2y=0 | | 2w=5w-69 | | 2(7x+4)+8(-7+6x)=18+63x | | 5/8(x-1/3)=5/15 | | 48x+24=8x= | | 65=23+14x | | 2p+3(2p)=680 | | (5x+60)+(12x+35)=180 | | 2s+9=6s-83 | | 3(x+10=2(3x+27) | | 4(6x+4)-20x=188 | | x/7=-59 | | -1/2=6/5v-1/3 | | 1−3a-4+9=7 | | 41-2n=-5(2n-8 | | a+6=15+3a | | 5-y=184 |