*SHOW THAT*
(a) (9p-5q)square+180pq=(9p+5q)square
pls answer this i have exams!!!
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(9p-5q)^2+180pq
81p^2-90pq+25q^2+180pq
81p^2+(-90+180)+25q^2
81p^2+90pq+25q^2
(9p+5q)^2
proved
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