x^2-1.7x-9.2=0

Solution for x^2-1.7x-9.2=0 equation:

x^2-1.7x-9.2=0

a = 1; b = -1.7; c = -9.2;
Δ = b2-4ac
Δ = -1.72-4·1·(-9.2)
Δ = 39.69
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{-(-1.7)-\sqrt{39.69}}{2*1}=\frac{1.7-\sqrt{39.69}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.7)+\sqrt{39.69}}{2*1}=\frac{1.7+\sqrt{39.69}}{2}
$