5x-17=-2x2

Solution for 5x-17=-2x2 equation:

5x-17=-2x^2

We move all terms to the left:

5x-17-(-2x^2)=0

We get rid of parentheses

2x^2+5x-17=0

a = 2; b = 5; c = -17;
Δ = b2-4ac
Δ = 52-4·2·(-17)
Δ = 161
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{161}}{2*2}=\frac{-5-\sqrt{161}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{161}}{2*2}=\frac{-5+\sqrt{161}}{4}
$