If it's not what You are looking for type in the equation solver your own equation and let us solve it.
8+4x-4.9x^2=0
a = -4.9; b = 4; c = +8;
Δ = b2-4ac
Δ = 42-4·(-4.9)·8
Δ = 172.8
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{-(4)-\sqrt{172.8}}{2*-4.9}=\frac{-4-\sqrt{172.8}}{-9.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+\sqrt{172.8}}{2*-4.9}=\frac{-4+\sqrt{172.8}}{-9.8} $
| 1+3x+4x=7x+1 | | 3/4x+6=5+3/8x | | -3x+3=4-2x | | -8-n=3(2n+4) | | 0=-16t^2-40t+700 | | x/−3=6/27 | | 3(x+6)=-4x+7 | | 10x-2-9x=-8 | | 7m+4=60,7 | | 3/2x=-9/2 | | (7/6v-21/40=3/8-10/3v) | | r/1.2=3.4 | | -5/4=7/8u-4/3 | | -2r+9=43 | | -9y+27=3(y+1) | | -(1+k)=2 | | 10+3/4y=43 | | -11=5(v-5)-7v | | 4x=12=2x+5= | | 2x+19=3x-18 | | w^2=19w | | 6x+17=97 | | -10n+5=-45 | | 5x-15=7×+3 | | 4x=12=2x+5 | | -4(9+n)=-68 | | 2x+11=129 | | -2/7-1/2y=-3/5 | | 12x^2+100x=0 | | u/8+10.6=-2.2 | | 2+w/3=-1.75 | | 4.1=-2v+29.7 |