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

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

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

We move all terms to the left:

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


We calculate terms in parentheses: -(x^2-(2x-1)), so:

x^2-(2x-1)

We get rid of parentheses

x^2-2x+1

Back to the equation:

-(x^2-2x+1)


We get rid of parentheses

3x^2-x^2+4x+2x-1-2=0

We add all the numbers together, and all the variables

2x^2+6x-3=0

a = 2; b = 6; c = -3;
Δ = b2-4ac
Δ = 62-4·2·(-3)
Δ = 60
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{60}=\sqrt{4*15}=\sqrt{4}*\sqrt{15}=2\sqrt{15}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-2\sqrt{15}}{2*2}=\frac{-6-2\sqrt{15}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+2\sqrt{15}}{2*2}=\frac{-6+2\sqrt{15}}{4}
$