2-3x(x-5)=1

Solution for 2-3x(x-5)=1 equation:

2-3x(x-5)=1

We move all terms to the left:

2-3x(x-5)-(1)=0

We add all the numbers together, and all the variables

-3x(x-5)+1=0

We multiply parentheses

-3x^2+15x+1=0

a = -3; b = 15; c = +1;
Δ = b2-4ac
Δ = 152-4·(-3)·1
Δ = 237
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(15)-\sqrt{237}}{2*-3}=\frac{-15-\sqrt{237}}{-6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+\sqrt{237}}{2*-3}=\frac{-15+\sqrt{237}}{-6}
$