show that: (9p-5q)²+180pq=(9p+5q)²
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Answer:
(9p-5q)2+180pq=9p+5q)2
Step-by-step explanation:
L.H.S. = (9p)2-2 (9p) (5q) + (5q) + 180pq
= 81p2 - 90pq + 25q2 + 180pq
= 81p2 - 90pq + 25q2
R.H.S. = (9p+5q)2
= (9p) + 2 (9p) (5q) + (5q)2
= 81p2 - 90pq + 25q2
L.H.S. = R.H.S.
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