2=2x2+5x

Solution for 2=2x2+5x equation:

2=2x^2+5x

We move all terms to the left:

2-(2x^2+5x)=0

We get rid of parentheses

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

a = -2; b = -5; c = +2;
Δ = b2-4ac
Δ = -52-4·(-2)·2
Δ = 41
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{-(-5)-\sqrt{41}}{2*-2}=\frac{5-\sqrt{41}}{-4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-5)+\sqrt{41}}{2*-2}=\frac{5+\sqrt{41}}{-4}
$