0.25=-4.9x^2+3x+1.75

Solution for 0.25=-4.9x^2+3x+1.75 equation:

0.25=-4.9x^2+3x+1.75

We move all terms to the left:

0.25-(-4.9x^2+3x+1.75)=0

We get rid of parentheses

4.9x^2-3x-1.75+0.25=0

We add all the numbers together, and all the variables

4.9x^2-3x-1.5=0

a = 4.9; b = -3; c = -1.5;
Δ = b2-4ac
Δ = -32-4·4.9·(-1.5)
Δ = 38.4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-\sqrt{38.4}}{2*4.9}=\frac{3-\sqrt{38.4}}{9.8}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{38.4}}{2*4.9}=\frac{3+\sqrt{38.4}}{9.8}
$