(6+v)(5v-4)=0

Solution for (6+v)(5v-4)=0 equation:

(6+v)(5v-4)=0

We add all the numbers together, and all the variables

(v+6)(5v-4)=0

We multiply parentheses ..

(+5v^2-4v+30v-24)=0

We get rid of parentheses

5v^2-4v+30v-24=0

We add all the numbers together, and all the variables

5v^2+26v-24=0

a = 5; b = 26; c = -24;
Δ = b2-4ac
Δ = 262-4·5·(-24)
Δ = 1156
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1156}=34$
$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(26)-34}{2*5}=\frac{-60}{10}
=-6
$
$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(26)+34}{2*5}=\frac{8}{10}
=4/5
$