Question 526716
It looks like the general form would be
{{{ ( x - ay )*( x - by ) }}}
That gives you the right signs
when you expand it
If {{{a=2}}} and {{{b=12}}},
that doesn't give me an {{{11}}}
in the middle term
Suppose {{{ a = 3 }}} and {{{ b = 8 }}}
{{{ (x - 3y)*(x - 8y) }}}
{{{ x^2 - 11y + 24y^2 }}}