If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0=6.5+42x-4.9x^2
We move all terms to the left:
0-(6.5+42x-4.9x^2)=0
We add all the numbers together, and all the variables
-(6.5+42x-4.9x^2)=0
We get rid of parentheses
4.9x^2-42x-6.5=0
a = 4.9; b = -42; c = -6.5;
Δ = b2-4ac
Δ = -422-4·4.9·(-6.5)
Δ = 1891.4
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{-(-42)-\sqrt{1891.4}}{2*4.9}=\frac{42-\sqrt{1891.4}}{9.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-42)+\sqrt{1891.4}}{2*4.9}=\frac{42+\sqrt{1891.4}}{9.8} $
| 580=26n+8 | | -6v+1=43 | | 69=21^x | | 2/3h-156=13/24 | | a–5/6=-32/3= | | 3a+9=2a-1 | | (8,-8)m=1/8 | | 0.2(5x−6)+2x=0.8 | | 1/2t=4=3 | | -16-8n=-10 | | -4f=-48 | | 4b-(7)=37 | | x/9-5=17/18 | | (2x^2+7x-49)=0 | | 2-x=-2x-8 | | 11-2(8+3x)=14 | | 40(14.50)=26n+8 | | 2/3h-156=3^13/24 | | 5(7x)+4+2=30 | | 3(2x-2)=(2x+3) | | (22^2+7x-49)=0 | | -22=-2(5+k) | | 14=7x-30 | | 40z^2+43z=0 | | 3d-9=5d-11 | | 11/6r-1=5/6r | | 2(a-6)^2-45=53 | | 3d-9=5d-11. | | y/12+5=-19 | | 8(3-x)=2x+5 | | x•11=73 | | -9x-4=-11 |