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Answer:
Step-by-step explanation:
We know that (a + b)² - (a - b)² = 4ab.
(4xy+3y)² - (4xy - 3y)² = 4 * 4xy*3y = 48xy²
Equating this to xy²k
48xy² = xy²k
=> k = 48.
The value of k = 48