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2v-3v^2=-9
We move all terms to the left:
2v-3v^2-(-9)=0
We add all the numbers together, and all the variables
-3v^2+2v+9=0
a = -3; b = 2; c = +9;
Δ = b2-4ac
Δ = 22-4·(-3)·9
Δ = 112
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}$$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{112}=\sqrt{16*7}=\sqrt{16}*\sqrt{7}=4\sqrt{7}$$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-4\sqrt{7}}{2*-3}=\frac{-2-4\sqrt{7}}{-6} $$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+4\sqrt{7}}{2*-3}=\frac{-2+4\sqrt{7}}{-6} $
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