Question

show that : (9p-5q) whole square +180pq=(9q+5q)whole square​

Answer 1

Answer

   (9p−5q)2+180pq=(9p+5q)2

LHS=(9p)2−2(9p)(5q)+(5q)2+180pq

       =81p2−90pq+25q2+180pq

       =81p2+90pq+25q2

RHS=(9p+5q)2

       =(9p)2+2(9p)(5q)+(5q)2

       =81p2+90pq+25q2

LHS=RHS