(9p-5q)² + 180pq = (9p+5q)²
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Step-by-step explanation:
(9p-5q)^2+180pq=(9p+5q)^2
81p^2+25q^2-90pq+180pq= 81p^2+25q^2+90pq
180pq=180pq
answer: 1
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