Question

Add p(p - 9), 9(9-r) and r(r-p)​

Answer 1

Hey Mate!!

p(p-9) + 9 (9-r ) + r ( r-p)

P^2 - 9p + 18 - 9r + r^2 - pr

Hope this helps you!!

Answer 2

p²-9p+81-9r+r²-rp

p²+r²-9p-rp+81

if can solve and did ut further