8x2+30x+25=0

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Solution for 8x2+30x+25=0 equation:



8x^2+30x+25=0
a = 8; b = 30; c = +25;
Δ = b2-4ac
Δ = 302-4·8·25
Δ = 100
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{100}=10$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(30)-10}{2*8}=\frac{-40}{16} =-2+1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(30)+10}{2*8}=\frac{-20}{16} =-1+1/4 $

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