Step-by-step explanation: √a² - x² is in the form of (a² - b²)
Soo....
(a² - b²) = (a + b) (a - b)
Here, a = √a
b = x
Soo... √a² - x² = (√a + x) (√a - x)
(√a + x) (√a - x) = √a² - x² a - x² ( More Simplified)
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