If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-4v^2+7v+15=0
a = -4; b = 7; c = +15;
Δ = b2-4ac
Δ = 72-4·(-4)·15
Δ = 289
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{289}=17$$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-17}{2*-4}=\frac{-24}{-8} =+3 $$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+17}{2*-4}=\frac{10}{-8} =-1+1/4 $
| (x-4)^2=3 | | 5/2x+1/2x=5x+11/2+7/2x | | Y+87=4y | | 3d=5.76 | | n+84=(-37) | | 7w+10=-10+w-4 | | 4.3q-1.2-5.7=-0.4q-1.2 | | 5/6x-19=-2/8x-25 | | 33x79=x | | 4.5x-3=3.5x-3 | | 6u=408 | | 5.3x-5=4.3x | | 3(x+2(6-x))=3x+1 | | x+13.2=-6.7 | | 5y-8+y+19=7y+20-4y | | 7(x+5)=182 | | (-5.7)=(-3q) | | ((3x+19)/4)+((x+53)/7)=15 | | 4x+61=17 | | 18.7=u+1.7 | | 6/7r=7/8 | | 6•b=2•b-8 | | ^^6x3x4x5+2223333=23344 | | 7x/4-3=2=9x/2 | | 91/3=÷(2b) | | 45m=16 | | s+(-11.2)=(-10.91) | | 15p^2+60=0 | | 8+4n=-44 | | m/3(m-10)=0 | | f/(-26)=(-12) | | -4j=8 |