exam Maths Puzzle Numerical Ability

The town of Logville has been experiencing a steady decline in its population since 1980. Records reveal the population numbers recorded in the table:
x: 5, 10, 15
y:11300, 10244

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find two consecutive even numbers such that the difference of their squares is 44. the answer is 10 and 12 but i need to show the work on how to come to the answer..