Question 1111218
{{{12a^2-25ab+7b^2 =0}}}

{{{12a^2 -21ab-4ab+7b^2=0}}}

{{{3a(4a-7b)-b(4a-7b)=0}}}

{{{(3a-b)(4a-7b) =0}}}

either (3a-b) =0 or (4a-7b)=0
3a-b=0
3a=b
a/b =1/2

Or
4a-7b=0
4a=7b
a/b = 7/4

choose one which is a proper fraction