-45x^2+2x+28=28

Solution for -45x^2+2x+28=28 equation:

-45x^2+2x+28=28

We move all terms to the left:

-45x^2+2x+28-(28)=0

We add all the numbers together, and all the variables

-45x^2+2x=0

a = -45; b = 2; c = 0;
Δ = b2-4ac
Δ = 22-4·(-45)·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2}{2*-45}=\frac{-4}{-90}
=2/45
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2}{2*-45}=\frac{0}{-90}
=0
$