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Given that S(x, y) = x^2 – y^2 and we need to find the value of S(3, S(3, 4))

To find S(3, 4) we need to compare what is inside the ( ) in S(3, 4) and S(x, y)

=> We need to substitute x with 3 and y with 4 in S(x, y) = \(x^2 – y^2\) to get the value of S(3, 4)

=> S(3, 4) = \(3^2 – 4^2\) = 9 - 16 = -7

=> S(3, S(3, 4)) = S(3,-7) = \(3^2 – (-7)^2\) = 9 - 49 = -40

So, Answer will be A
Hope it helps!

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