Two natural numbers: (a +/- b)^2 and ab given, find a^2 - b^2

This type of question, asked 2 times: 18 Jul 2023 S3, 20 Jul 2023 S1. All 2 questions below, oldest first.

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Question 1
18 Jul 2023 S3
56 $The square of the difference between two given natural numbers is 324, while the product of these two given numbers is 144. Find the positive difference between the squares of these two given numbers.$
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Question 2
20 Jul 2023 S1
58 $The square of the sum of two given natural numbers is 784, while the product of the two given numbers is 192. Find the positive difference between the squares of these two given numbers.$
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Question 1