2x(x-3)+5(x-1)=-4

Solution for 2x(x-3)+5(x-1)=-4 equation:

2x(x-3)+5(x-1)=-4

We move all terms to the left:

2x(x-3)+5(x-1)-(-4)=0

We add all the numbers together, and all the variables

2x(x-3)+5(x-1)+4=0

We multiply parentheses

2x^2-6x+5x-5+4=0

We add all the numbers together, and all the variables

2x^2-1x-1=0

a = 2; b = -1; c = -1;
Δ = b2-4ac
Δ = -12-4·2·(-1)
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-3}{2*2}=\frac{-2}{4}
=-1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+3}{2*2}=\frac{4}{4}
=1
$