2(x*x)-23x+30=0

Solution for 2(x*x)-23x+30=0 equation:

2(x*x)-23x+30=0

We add all the numbers together, and all the variables

2(+x*x)-23x+30=0

We add all the numbers together, and all the variables

-23x+2(+x*x)+30=0

We multiply parentheses

2x^2-23x+30=0

a = 2; b = -23; c = +30;
Δ = b2-4ac
Δ = -232-4·2·30
Δ = 289
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{289}=17$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-23)-17}{2*2}=\frac{6}{4}
=1+1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-23)+17}{2*2}=\frac{40}{4}
=10
$