Question 405384
{{{49r^2 -28r + 4}}}
I notice that if I say {{{s = 7r}}}, then I can say
{{{s^2 - 4s + 4}}}
This is obviously factored to
{{{(s - 2)^2}}}
Now I can put it in terms of {{{r}}}
{{{(7r - 2)^2}}}
There are 2 factors, and they are both {{{7r - 2}}}