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9v^2+7v=-5
We move all terms to the left:
9v^2+7v-(-5)=0
We add all the numbers together, and all the variables
9v^2+7v+5=0
a = 9; b = 7; c = +5;
Δ = b2-4ac
Δ = 72-4·9·5
Δ = -131
Delta is less than zero, so there is no solution for the equation
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