Hi,
I know how to solve a quadratic equation but I have a book where nearly all quadratics problems are finished in this form>
for (4y^2-20y+25) +y^2 = 25
----------------
> 5y(y-4) = 0 <---- this form
----------------
what means that y1 = 4 and y2 = 0
why can they just take the numbers out of this form? and how is this form called? where can i get some more information about it?
Thank you,
Peter
I know how to solve a quadratic equation but I have a book where nearly all quadratics problems are finished in this form>
for (4y^2-20y+25) +y^2 = 25
----------------
> 5y(y-4) = 0 <---- this form
----------------
what means that y1 = 4 and y2 = 0
why can they just take the numbers out of this form? and how is this form called? where can i get some more information about it?
Thank you,
Peter