575=y(y*1.7)

Solution for 575=y(y*1.7) equation:

575=y(y*1.7)

We move all terms to the left:

575-(y(y*1.7))=0

We add all the numbers together, and all the variables

-(y(+y*1.7))+575=0


We calculate terms in parentheses: -(y(+y*1.7)), so:

y(+y*1.7)

We multiply parentheses

1.7y^2

Back to the equation:

-(1.7y^2)


We get rid of parentheses

-1.7y^2+575=0

a = -1.7; b = 0; c = +575;
Δ = b2-4ac
Δ = 02-4·(-1.7)·575
Δ = 3910
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{3910}}{2*-1.7}=\frac{0-\sqrt{3910}}{-3.4}
=-\frac{\sqrt{}}{-3.4}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{3910}}{2*-1.7}=\frac{0+\sqrt{3910}}{-3.4}
=\frac{\sqrt{}}{-3.4}
$