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Let z=x2y2z = x ^ { 2 } - y ^ { 2 }

Question 54

Multiple Choice

Let z=x2y2z = x ^ { 2 } - y ^ { 2 } where x = 3r - s, y = r + 2s. When r = 1, s = 1, zrz _ { r } is


A) 1- 1
B) 176\frac { 17 } { 6 }
C) 4
D) 6
E) 116\frac { 11 } { 6 }

Correct Answer:

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