(2a + 5b + 3c)2 + (5b + 3c - a)2 - 2 (2a + 5b + 3c) (5b + 3c - a) এর সরলকৃত রূপ কোনটি?
4ab
9a2
6b2
4a2
ax + by = a2 + b2 এবং 2bx - ay = ab সমীকরণে (x, y) এর মান কত?
(3a, 4b)
(2a, b)
(b, a)
(a, b)
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