If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3r^2+8r-80=0
a = 3; b = 8; c = -80;
Δ = b2-4ac
Δ = 82-4·3·(-80)
Δ = 1024
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1024}=32$$r_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-32}{2*3}=\frac{-40}{6} =-6+2/3 $$r_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+32}{2*3}=\frac{24}{6} =4 $
| 6(x-2)2x-3(x-5)=7 | | +(x)-(-50)=90 | | 3.2+3x=6.4 | | 1.4g+2.4=0.8+8.1 | | -(2c-8)=7 | | (64)=15-x/x | | 0.5(8y–4y)=16 | | 3x-40x3=3120 | | 2(x-3)+3x-(2-x)=22 | | 7x-4(-3x+3)=-12 | | 5.5x=6.05 | | 6+14×4/x=26 | | 6x+4x=144 | | 6+14×4/z=26 | | 10y-6y=60 | | 6m=36 | | 4.5y=45 | | 5–2+7–x= | | Y=2(x-3)^2+4 | | 4g=24 | | 10x6)(10x8)=10^10 | | 621=45-x | | +6x=-2x-4 | | 9.5x+5=4.5+40 | | 26=6+14×4/z | | 2x•2+188=4298 | | 22222m+4=66670 | | +6=-2x-4 | | 13x+3x+10x-x=100 | | 3x-“-4=-1 | | 8+10p=32 | | +7x=-2x-4 |