Question 912345
{{{7p^2+18p-9=0}}}


{{{7p^2+21p-3p-9=0}}}



{{{7p(p+3)-3(p+3)=0}}}


{{{(p+3)(7p-3)=0}}}

either (p+3)=0

p=-3

OR
7p-3=0

7p=3
p=3/7