10.x^2+8x+15=

Solution for 10.x^2+8x+15= equation:

10.x^2+8x+15=

We move all terms to the left:

10.x^2+8x+15-()=0

We add all the numbers together, and all the variables

10.x^2+8x=0

a = 10.; b = 8; c = 0;
Δ = b2-4ac
Δ = 82-4·10.·0
Δ = 64
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{64}=8$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-8}{2*10.}=\frac{-16}{20}
=-4/5
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+8}{2*10.}=\frac{0}{20}
=0
$