-3.28(-4.4)+(-x)x=9.7

Solution for -3.28(-4.4)+(-x)x=9.7 equation:

-3.28(-4.4)+(-x)x=9.7

We move all terms to the left:

-3.28(-4.4)+(-x)x-(9.7)=0

We add all the numbers together, and all the variables

(-1x)x-3.28(-4.4)-(9.7)=0

We add all the numbers together, and all the variables

(-1x)x+4.732=0

We multiply parentheses

-1x^2+4.732=0

a = -1; b = 0; c = +4.732;
Δ = b2-4ac
Δ = 02-4·(-1)·4.732
Δ = 18.928
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{-(0)-\sqrt{18.928}}{2*-1}=\frac{0-\sqrt{18.928}}{-2}
=-\frac{\sqrt{}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{18.928}}{2*-1}=\frac{0+\sqrt{18.928}}{-2}
=\frac{\sqrt{}}{-2}
$